disco-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly.

Origin: A borrowing from Latin. Etymon: Latin disco-.

Etymology: < classical Latin disco- (in e.g. discobolus discobolus n.) < ancient Greek δισκο- , combining form (in e.g. δίσκουρα quoit's cast) of δίσκος disc n. Compare German disco- (formations in which are found from at least the late 19th cent.).Earliest in the first half of the 17th cent. in the isolated Latin loan discobolus n.; subsequently from the first half of the 19th cent., originally in adaptations from Latin. New formations within English are attested from the late 19th cent., e.g. discohexaster n., discotriaene n. Combining with second elements ultimately of Greek or Latin origin.

Used to form scientific nouns and adjectives relating to disc-shaped parts or structures.

discoblastic adj.

Brit.

/ˌdɪskə(ʊ)ˈblastɪk/

U.S.

/ˌdɪskoʊˈblæstɪk/

/ˌdɪskəˈblæstɪk/

[after German discoblastisch (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 426)] Embryology (now rare) involving or undergoing discoidal cleavage (see discoidal adj. 3); relating to or characterized by a discoblastula.

ΚΠ

1876 Q. Jrnl. Microsc. Sci. 16 62 The Discoblastic type of development is found in Birds.

1905 J. McCabe tr. E. Haeckel Evol. Man I. viii. 164 In the discoblastic ova the food-yelk gathers at one side.

1975 Aquatic Sci. & Fisheries Abstr. No. 11. 129/1 Cleavage is highly disturbed and eggs always appear in discoblastic form.

discoblastula n.

Brit.

/ˌdɪskə(ʊ)ˈblastjᵿlə/

/ˌdɪskə(ʊ)ˈblastʃᵿlə/

U.S.

/ˌdɪskoʊˈblæstʃələ/

/ˌdɪskəˈblæstʃələ/

[after German Discoblastula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology the disc-shaped blastula or blastoderm formed after discoidal cleavage in a meroblastic ovum.

ΚΠ

1876 Q. Jrnl. Microsc. Sci. 16 Pl. VII Discoblastula of the same Oniscus.

1998 J. Lombardi Compar. Vertebr. Reprod. vii. 222 By the end of cleavage, cellular components of the blastoderm are divided into an outer epiblast and an inner hypoblast and comprise a bilayered blastoderm or discoblastula.

2003 D. I. Williamson Origins Larvae iv. 34 Involution occurs when some of the cells of a discoblastula..turn under the others and become endoderm.

discocarp n.

Brit.

/ˈdɪskə(ʊ)kɑːp/

U.S.

/ˈdɪskəˌkɑrp/

[in sense (a) after scientific Latin discocarpium (1843 or earlier)] †(a) Botany a fruit-like structure consisting of a number of dry fruits or achenes within a hollow, typically fleshy, receptacle, as in the rose hip (obsolete); (b) Mycology a disc-like fruiting body of fungi of the (former) order or class Discomycetes (cf. discomycete n.) and hence also of lichens having a fungal component from this group.

ΚΠ

1862 M. C. Cooke Man. Bot. Terms 30 Discocarp, a collection of fruits in a hollow receptacle.

1887 H. E. F. Garnsey & I. B. Balfour tr. H. A. de Bary Compar. Morphol. & Biol. Fungi 494/1 Discocarp, in Ascomycetes: ascocarp in which the hymenium lies exposed whilst the asci are maturing.

1915 Ann. Missouri Bot. Garden 2 336 (caption) Section of mature discocarp.

2004 Mycologia 96 628/2 Hymenia at this stage were grayish white and the peridial hyphae above them frequently were sparse; thus ascomata looked like discocarps.

discocarpous adj.

Brit.

/ˌdɪskə(ʊ)ˈkɑːpəs/

U.S.

/ˌdɪskoʊˈkɑrpəs/

[after German discocarp (1874 or earlier); compare earlier discocarp n.] Mycology of, relating to, or having a discocarp (discocarp n. (b)).

ΚΠ

1887 H. E. F. Garnsey & I. B. Balfour tr. H. A. de Bary Compar. Morphol. & Biol. Fungi v. 198 Of gymnocarpous and discocarpous [Ger. discocarpen] forms.

1914 Bull. Torrey Bot. Club 41 182 If the hymenial layer subsequently develops superficially the ascocarp must certainly be described as discocarpous.

2001 Organisms, Diversity & Evol. 1 100/1 Brodo..compared the diverse characters of the genus with the corresponding features in pyrenocarpous and discocarpous lichenized fungi.

† discocephalous adj. [after scientific Latin Discocephali, suborder name ( P. Bleeker Enumeratio specierum piscium in archipelago Indico (1859) p. xxvi)] Zoology Obsolete rare of, relating to, or characteristic of a (former) suborder Discocephali of fishes characterized by a sucker on the head, containing only the remoras (family Echeneidae).Apparently only attested in dictionaries or glossaries.

ΚΠ

1889 Cent. Dict. Discocephalous, having a sucking-disk on the head; specifically, pertaining to or having the characters of the Discocephali.

† discocytula n. [after German Discocytula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology Obsolete rare (Haeckel's term for) a fertilized meroblastic (discoblastic) ovum prior to cleavage (cf. cytula n.).

ΚΠ

1876 Q. Jrnl. Microsc. Sci. 16 61 Haeckel is very careful to insist on the unicellular character of the Discomonerula and Discocytula, even where it attains the large size seen in Birds.

† discodactyl adj. Zoology Obsolete rare having toes dilated at the end to form an adhesive disc, as in tree frogs; = platydactyl n. and adj. (b) at platy- comb. form . [After scientific Latin Discodactyla (1872 or earlier as group name; later also in form Discodactylia); compare scientific Latin discodactylus (1833 as genus name, 1884 or earlier as specific name), French discodactyles, plural noun (1885 or earlier).]

ΚΠ

1889 Cent. Dict. Discodactyl, discodactyle, having toes dilated at the end into a sort of disk; platydactyl: applied specifically to certain groups of batrachians, as tree-toads and tree-frogs, in distinction from oxydactyl.

discodactylous adj.

Brit.

/ˌdɪskə(ʊ)ˈdaktᵻləs/

/ˌdɪskə(ʊ)ˈdaktl̩əs/

U.S.

/ˌdɪskoʊˈdæktələs/

Zoology rare = discodactyl adj.Apparently only attested in dictionaries or glossaries.

ΚΠ

1896 N.E.D. at Disco- Discodactylous.

1920 I. F. Henderson & W. D. Henderson Dict. Sci. Terms 79/1 Discodactylous, with suckers at the ends of the fingers.

discogastrula n.

Brit.

/ˌdɪskə(ʊ)ˈɡastrᵿlə/

U.S.

/ˌdɪskoʊˈɡæstrələ/

[after German Discogastrula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology rare a gastrula formed from a discoblastula by involution of the margins.Apparently only attested in dictionaries or glossaries.

ΚΠ

1876 Q. Jrnl. Microsc. Sci. 16 60 The result is the formation of a Discogastrula perched on a mass of food-material.

1990 P. Willmer Invertebr. Relationships v. 112 Something rather similar [to epiboly]..happens, a few cells tucking in under the disc of ectoderm to become the endoderm, all still lying on top of the mass of yolk. This is termed involution and the end-product is a discogastrula.

discohexaster n.

Brit.

/ˌdɪskə(ʊ)hɛkˈsastə/

U.S.

/ˌdɪskoʊhɛkˈsæstər/

Zoology (in sponges) a hexaster with the rays ending in discs.

ΚΠ

1876 R. von Lendenfeld in Proc. Zool. Soc. 578 Discohexaster in the interior.

1968 P. Brien in M. Florkin & B. T. Scheer Chem. Zool. II. i. i. 19 The triaxons are pinulated, or they may be oxyhexasters or discohexasters.

2002 H. M. Reiswig & B. Wheeler in J. N. A. Hooper & R. W. M. Van Soest Syst. Porifera II. 1311/1 Small rare discohexaster 55 μm in diameter, has 14 μm-long primary rays bearing 4 incurved terminals ending in small discs.

discomedusan n. and adj.

Brit.

/ˌdɪskə(ʊ)mᵻˈdjuːz(ə)n/

/ˌdɪskə(ʊ)mᵻˈdjuːs(ə)n/

/ˌdɪskə(ʊ)mᵻˈdʒuːz(ə)n/

/ˌdɪskə(ʊ)mᵻˈdʒuːs(ə)n/

U.S.

/ˌdɪskoʊməˈd(j)uz(ə)n/

/ˌdɪskoʊməˈd(j)us(ə)n/

[after scientific Latin Discomedusae, order name ( Haeckel Gen. Morphol. der Organismen (1866) II. p. lx)] Zoology (a) n. a jellyfish of the order or (later) subclass Discomedusae of scyphozoan cnidarians having a free-swimming, typically saucer-shaped or hemispherical medusa as the main stage in their life cycle; (b) adj. of or relating to this order or subclass.The group originally included all members of the class Scyphozoa other than the stalked jellyfishes, but these are now placed in a distinct class ( Staurozoa), as are the box jellyfishes (now class Cubozoa), and Discomedusae now comprises all remaining scyphozoans other than the crown jellyfishes (order Coronatae).

ΚΠ

1889 Cent. Dict. Discomedusan, a. pertaining to or having the characters of the Discomedusæ. n. one of the Discomedusæ.

1891 Cent. Dict. at Subgenital Situated beneath the genitalia: specifically noting certain pits or pouches of jellyfishes, as the rhizostomous or monostomous discomedusans.

1934 R. Ruedemann Paleozoic Plankton N. Amer. 28 Walcott at first tentatively considered them as the impression of the mouth and gastric cavity of a species of Medusa and later as a discomedusan form itself, flattened in the slate.

1968 W. D. Russell-Hunter Biol. Lower Invertebr. iii. 34 Most discomedusans like Aurelia have a life-cycle pattern which involves a settled polyp of a peculiar form.

2010 Biol. Bull. 219 250/2 The Discomedusae includes the order Semaeostomeae, which is now confirmed to be paraphyletic with respect to the other discomedusan order, Rhizostomeae.

† discomedusoid adj. Zoology Obsolete rare = discomedusan n. and adj. (b).

ΚΠ

1889 Cent. Dict. Discomedusoid, resembling a discomedusan; related or belonging to the Discomedusæ.

† discomonerula n. [after German Discomonerula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology Obsolete rare (Haeckel's term for) a meroblastic (discoblastic) ovum immediately after fertilization (cf. monerula n.).

ΚΠ

1876 Q. Jrnl. Microsc. Sci. 16 61 Haeckel is very careful to insist on the unicellular character of the Discomonerula and Discocytula, even where it attains the large size seen in Birds.

† discomorula n. [after German Discomorula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology Obsolete rare the disc-shaped morula formed on the surface of the yolk in the earliest stage of discoidal cleavage in a meroblastic ovum.

ΚΠ

1876 Q. Jrnl. Microsc. Sci. 16 Pl. VII Discomorula of a Slater.

† discoplacental adj. Zoology Obsolete relating to or characterized by a discoid placenta, as in primates, rodents, insectivores, and bats; contrasted with zonoplacental adj. at zono- comb. form . [After either or both of scientific Latin Discoplacentalia, group name ( Haeckel Gen. Morphol. der Organismen (1866) II. p. cxlviii; > German Discoplacentalien, plural (in the same source)), German discoplacental, adjective (1866 or earlier in Haeckel, in the compound Discoplacental-Natur).]

ΚΠ

1872 Westm. Rev. Oct. 386 The above and other ‘disco-placental’ mammals.

1914 Q. Jrnl. Microsc. Sci. 60 212 This concentration and delimitation of the exostyle are what must necessarily precede the initial discoplacental adhesion.

† discoplacentalian adj. Zoology Obsolete rare = discoplacental adj.

ΚΠ

1878 A. Macalister Introd. Systematic Zool. & Morphol. Vertebr. Animals xl. 319 Disco-placentalian, claviculate mammals, with a flat nail on the hallux.

discoplasm n.

Brit.

/ˈdɪskəˌplaz(ə)m/

U.S.

/ˈdɪskəˌplæz(ə)m/

[after German Discoplasma (P. Ehrlich 1885, in Charité-Annalen 10 137)] Biology (now rare) the cytoplasm of a red blood cell (cf. disc n. 9b).

ΚΠ

1886 Brit. Med. Jrnl. 25 Dec. 1269/2 It is the stroma which constitutes the protoplasm or discoplasm of the cell.

1900 W. Myers tr. P. Ehrlich & A. Lazarus Histol. Blood 50 The discoplasm [Ger. das Discoplasma] loses its power of retaining the hæmoglobin, and gives it up to the blood plasma in ever increasing quantity.

discopodium n.

Brit.

/ˌdɪskə(ʊ)ˈpəʊdɪəm/

U.S.

/ˌdɪskoʊˈpoʊdiəm/

/ˌdɪskəˈpoʊdiəm/

(pl. discopodia) [after scientific Latin discopodium (1843 or earlier)] Botany a stalk supporting a disc-shaped structure such as a fungal fruiting body or a floral receptacle.

ΚΠ

1848 J. Lindley Gloss. Techn. Terms Bot. p. xxxiii Discopodium, the fruit or stalk on which some kinds of disk are elevated.

1895 F. W. Oliver et al. tr. A. Kerner von Marilaun Nat. Hist. Plants II. 308 The apothecum is transformed into a stalked cup or head-shaped discopodium.

1968 Bryologist 71 319 With its apical crater..the podetium would be a variant of the discopodia of the basic type.

2007 P. F. Cannon & P. M. Kirk Fungal Families of World Gloss. 422 Podetium, lichenized stem-like portion (stipe, or discopodium) bearing hymenial discs.

discopodous adj.

Brit.

/dᵻˈskɒpədəs/

U.S.

/dəˈskɑpədəs/

[after scientific Latin Discopoda, suborder name ( P. Fischer in Man. de conchyliologie (1884) 653)] Zoology rare having a disc-shaped foot; spec. of or relating to a suborder Discopoda of aquatic snails.Apparently only attested in dictionaries or glossaries.

ΚΠ

1896 N.E.D. at Disco- Discopodous, having the foot shaped as a disk; belonging to the section Discopoda of Gastropods.

1992 Acad. Press. Dict. Sci. & Technol. 657/1 Discopodous, having a disk-shaped foot.

† discostomatous adj. [after scientific Latin Discostomata, former class name (W. Saville-Kent, cited in the source of quot. 1877, fuller publication 1878 in Ann. & Mag. Nat. Hist. 1 7)] Zoology Obsolete having a disc-shaped mouth; spec. of or relating to the (former) class Discostomata of Protozoa (in Saville-Kent's system), containing the sponges and the choanoflagellates.

ΚΠ

1877 Zoologist 1 347 (title) The abstract of a ‘Monograph of the Gymnozoidal Discostomatous Flagellata, with a new Scheme of Classification of the Protozoa’, by Mr. W. Saville Kent, was read.

1886 Trans. Herts. Nat. Hist. Soc. 1883–85 3 Pl. VI (caption) Discostomatous Protozoa.

discotriaene n.

Brit.

/ˌdɪskə(ʊ)ˈtrʌɪiːn/

U.S.

/ˌdɪskoʊˈtraɪˌin/

Zoology (in sponges) a triaene in which the divergent rays are united to form a disc.

ΚΠ

1888 W. J. Sollas in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXV. p. lvii Varieties of the Triæne... Discotriæne... The cladome is a disc in which separate cladi are not distinguishable; and the axial rods representing them extend but a short distance from the cladal origin.

1968 P. Brien in M. Florkin & B. T. Scheer Chem. Zool. II. i. i. 9 The branches may merge to form a disc (discotriaene).

2010 A. V. Ereskovsky Compar. Embryol. Sponges iii. 174 In advanced stages, the embryo is surrounded by a single layer of discotriaenes in which the shaft is inwardly directed.

This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022).

单词	disco-
释义	disco-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Origin: A borrowing from Latin. Etymon: Latin disco-. Etymology: < classical Latin disco- (in e.g. discobolus discobolus n.) < ancient Greek δισκο- , combining form (in e.g. δίσκουρα quoit's cast) of δίσκος disc n. Compare German disco- (formations in which are found from at least the late 19th cent.).Earliest in the first half of the 17th cent. in the isolated Latin loan discobolus n.; subsequently from the first half of the 19th cent., originally in adaptations from Latin. New formations within English are attested from the late 19th cent., e.g. discohexaster n., discotriaene n. Combining with second elements ultimately of Greek or Latin origin. Used to form scientific nouns and adjectives relating to disc-shaped parts or structures. discoblastic adj. Brit. /ˌdɪskə(ʊ)ˈblastɪk/ , U.S. /ˌdɪskoʊˈblæstɪk/ , /ˌdɪskəˈblæstɪk/ [after German discoblastisch (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 426)] Embryology (now rare) involving or undergoing discoidal cleavage (see discoidal adj. 3); relating to or characterized by a discoblastula. ΚΠ 1876 Q. Jrnl. Microsc. Sci. 16 62 The Discoblastic type of development is found in Birds. 1905 J. McCabe tr. E. Haeckel Evol. Man I. viii. 164 In the discoblastic ova the food-yelk gathers at one side. 1975 Aquatic Sci. & Fisheries Abstr. No. 11. 129/1 Cleavage is highly disturbed and eggs always appear in discoblastic form. discoblastula n. Brit. /ˌdɪskə(ʊ)ˈblastjᵿlə/ , /ˌdɪskə(ʊ)ˈblastʃᵿlə/ , U.S. /ˌdɪskoʊˈblæstʃələ/ , /ˌdɪskəˈblæstʃələ/ [after German Discoblastula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology the disc-shaped blastula or blastoderm formed after discoidal cleavage in a meroblastic ovum. ΚΠ 1876 Q. Jrnl. Microsc. Sci. 16 Pl. VII Discoblastula of the same Oniscus. 1998 J. Lombardi Compar. Vertebr. Reprod. vii. 222 By the end of cleavage, cellular components of the blastoderm are divided into an outer epiblast and an inner hypoblast and comprise a bilayered blastoderm or discoblastula. 2003 D. I. Williamson Origins Larvae iv. 34 Involution occurs when some of the cells of a discoblastula..turn under the others and become endoderm. discocarp n. Brit. /ˈdɪskə(ʊ)kɑːp/ , U.S. /ˈdɪskəˌkɑrp/ [in sense (a) after scientific Latin discocarpium (1843 or earlier)] †(a) Botany a fruit-like structure consisting of a number of dry fruits or achenes within a hollow, typically fleshy, receptacle, as in the rose hip (obsolete); (b) Mycology a disc-like fruiting body of fungi of the (former) order or class Discomycetes (cf. discomycete n.) and hence also of lichens having a fungal component from this group. ΚΠ 1862 M. C. Cooke Man. Bot. Terms 30 Discocarp, a collection of fruits in a hollow receptacle. 1887 H. E. F. Garnsey & I. B. Balfour tr. H. A. de Bary Compar. Morphol. & Biol. Fungi 494/1 Discocarp, in Ascomycetes: ascocarp in which the hymenium lies exposed whilst the asci are maturing. 1915 Ann. Missouri Bot. Garden 2 336 (caption) Section of mature discocarp. 2004 Mycologia 96 628/2 Hymenia at this stage were grayish white and the peridial hyphae above them frequently were sparse; thus ascomata looked like discocarps. discocarpous adj. Brit. /ˌdɪskə(ʊ)ˈkɑːpəs/ , U.S. /ˌdɪskoʊˈkɑrpəs/ [after German discocarp (1874 or earlier); compare earlier discocarp n.] Mycology of, relating to, or having a discocarp (discocarp n. (b)). ΚΠ 1887 H. E. F. Garnsey & I. B. Balfour tr. H. A. de Bary Compar. Morphol. & Biol. Fungi v. 198 Of gymnocarpous and discocarpous [Ger. discocarpen] forms. 1914 Bull. Torrey Bot. Club 41 182 If the hymenial layer subsequently develops superficially the ascocarp must certainly be described as discocarpous. 2001 Organisms, Diversity & Evol. 1 100/1 Brodo..compared the diverse characters of the genus with the corresponding features in pyrenocarpous and discocarpous lichenized fungi. † discocephalous adj. [after scientific Latin Discocephali, suborder name ( P. Bleeker Enumeratio specierum piscium in archipelago Indico (1859) p. xxvi)] Zoology Obsolete rare of, relating to, or characteristic of a (former) suborder Discocephali of fishes characterized by a sucker on the head, containing only the remoras (family Echeneidae).Apparently only attested in dictionaries or glossaries. ΚΠ 1889 Cent. Dict. Discocephalous, having a sucking-disk on the head; specifically, pertaining to or having the characters of the Discocephali. † discocytula n. [after German Discocytula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology Obsolete rare (Haeckel's term for) a fertilized meroblastic (discoblastic) ovum prior to cleavage (cf. cytula n.). ΚΠ 1876 Q. Jrnl. Microsc. Sci. 16 61 Haeckel is very careful to insist on the unicellular character of the Discomonerula and Discocytula, even where it attains the large size seen in Birds. † discodactyl adj. Zoology Obsolete rare having toes dilated at the end to form an adhesive disc, as in tree frogs; = platydactyl n. and adj. (b) at platy- comb. form . [After scientific Latin Discodactyla (1872 or earlier as group name; later also in form Discodactylia); compare scientific Latin discodactylus (1833 as genus name, 1884 or earlier as specific name), French discodactyles, plural noun (1885 or earlier).] ΚΠ 1889 Cent. Dict. Discodactyl, discodactyle, having toes dilated at the end into a sort of disk; platydactyl: applied specifically to certain groups of batrachians, as tree-toads and tree-frogs, in distinction from oxydactyl. discodactylous adj. Brit. /ˌdɪskə(ʊ)ˈdaktᵻləs/ , /ˌdɪskə(ʊ)ˈdaktl̩əs/ , U.S. /ˌdɪskoʊˈdæktələs/ Zoology rare = discodactyl adj.Apparently only attested in dictionaries or glossaries. ΚΠ 1896 N.E.D. at Disco- Discodactylous. 1920 I. F. Henderson & W. D. Henderson Dict. Sci. Terms 79/1 Discodactylous, with suckers at the ends of the fingers. discogastrula n. Brit. /ˌdɪskə(ʊ)ˈɡastrᵿlə/ , U.S. /ˌdɪskoʊˈɡæstrələ/ [after German Discogastrula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology rare a gastrula formed from a discoblastula by involution of the margins.Apparently only attested in dictionaries or glossaries. ΚΠ 1876 Q. Jrnl. Microsc. Sci. 16 60 The result is the formation of a Discogastrula perched on a mass of food-material. 1990 P. Willmer Invertebr. Relationships v. 112 Something rather similar [to epiboly]..happens, a few cells tucking in under the disc of ectoderm to become the endoderm, all still lying on top of the mass of yolk. This is termed involution and the end-product is a discogastrula. discohexaster n. Brit. /ˌdɪskə(ʊ)hɛkˈsastə/ , U.S. /ˌdɪskoʊhɛkˈsæstər/ Zoology (in sponges) a hexaster with the rays ending in discs. ΚΠ 1876 R. von Lendenfeld in Proc. Zool. Soc. 578 Discohexaster in the interior. 1968 P. Brien in M. Florkin & B. T. Scheer Chem. Zool. II. i. i. 19 The triaxons are pinulated, or they may be oxyhexasters or discohexasters. 2002 H. M. Reiswig & B. Wheeler in J. N. A. Hooper & R. W. M. Van Soest Syst. Porifera II. 1311/1 Small rare discohexaster 55 μm in diameter, has 14 μm-long primary rays bearing 4 incurved terminals ending in small discs. discomedusan n. and adj. Brit. /ˌdɪskə(ʊ)mᵻˈdjuːz(ə)n/ , /ˌdɪskə(ʊ)mᵻˈdjuːs(ə)n/ , /ˌdɪskə(ʊ)mᵻˈdʒuːz(ə)n/ , /ˌdɪskə(ʊ)mᵻˈdʒuːs(ə)n/ , U.S. /ˌdɪskoʊməˈd(j)uz(ə)n/ , /ˌdɪskoʊməˈd(j)us(ə)n/ [after scientific Latin Discomedusae, order name ( Haeckel Gen. Morphol. der Organismen (1866) II. p. lx)] Zoology (a) n. a jellyfish of the order or (later) subclass Discomedusae of scyphozoan cnidarians having a free-swimming, typically saucer-shaped or hemispherical medusa as the main stage in their life cycle; (b) adj. of or relating to this order or subclass.The group originally included all members of the class Scyphozoa other than the stalked jellyfishes, but these are now placed in a distinct class ( Staurozoa), as are the box jellyfishes (now class Cubozoa), and Discomedusae now comprises all remaining scyphozoans other than the crown jellyfishes (order Coronatae). ΚΠ 1889 Cent. Dict. Discomedusan, a. pertaining to or having the characters of the Discomedusæ. n. one of the Discomedusæ. 1891 Cent. Dict. at Subgenital Situated beneath the genitalia: specifically noting certain pits or pouches of jellyfishes, as the rhizostomous or monostomous discomedusans. 1934 R. Ruedemann Paleozoic Plankton N. Amer. 28 Walcott at first tentatively considered them as the impression of the mouth and gastric cavity of a species of Medusa and later as a discomedusan form itself, flattened in the slate. 1968 W. D. Russell-Hunter Biol. Lower Invertebr. iii. 34 Most discomedusans like Aurelia have a life-cycle pattern which involves a settled polyp of a peculiar form. 2010 Biol. Bull. 219 250/2 The Discomedusae includes the order Semaeostomeae, which is now confirmed to be paraphyletic with respect to the other discomedusan order, Rhizostomeae. † discomedusoid adj. Zoology Obsolete rare = discomedusan n. and adj. (b). ΚΠ 1889 Cent. Dict. Discomedusoid, resembling a discomedusan; related or belonging to the Discomedusæ. † discomonerula n. [after German Discomonerula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology Obsolete rare (Haeckel's term for) a meroblastic (discoblastic) ovum immediately after fertilization (cf. monerula n.). ΚΠ 1876 Q. Jrnl. Microsc. Sci. 16 61 Haeckel is very careful to insist on the unicellular character of the Discomonerula and Discocytula, even where it attains the large size seen in Birds. † discomorula n. [after German Discomorula (Haeckel 1875, in Jenaische Zeitschr. f. Naturwissensch. 9 407)] Embryology Obsolete rare the disc-shaped morula formed on the surface of the yolk in the earliest stage of discoidal cleavage in a meroblastic ovum. ΚΠ 1876 Q. Jrnl. Microsc. Sci. 16 Pl. VII Discomorula of a Slater. † discoplacental adj. Zoology Obsolete relating to or characterized by a discoid placenta, as in primates, rodents, insectivores, and bats; contrasted with zonoplacental adj. at zono- comb. form . [After either or both of scientific Latin Discoplacentalia, group name ( Haeckel Gen. Morphol. der Organismen (1866) II. p. cxlviii; > German Discoplacentalien, plural (in the same source)), German discoplacental, adjective (1866 or earlier in Haeckel, in the compound Discoplacental-Natur).] ΚΠ 1872 Westm. Rev. Oct. 386 The above and other ‘disco-placental’ mammals. 1914 Q. Jrnl. Microsc. Sci. 60 212 This concentration and delimitation of the exostyle are what must necessarily precede the initial discoplacental adhesion. † discoplacentalian adj. Zoology Obsolete rare = discoplacental adj. ΚΠ 1878 A. Macalister Introd. Systematic Zool. & Morphol. Vertebr. Animals xl. 319 Disco-placentalian, claviculate mammals, with a flat nail on the hallux. discoplasm n. Brit. /ˈdɪskəˌplaz(ə)m/ , U.S. /ˈdɪskəˌplæz(ə)m/ [after German Discoplasma (P. Ehrlich 1885, in Charité-Annalen 10 137)] Biology (now rare) the cytoplasm of a red blood cell (cf. disc n. 9b). ΚΠ 1886 Brit. Med. Jrnl. 25 Dec. 1269/2 It is the stroma which constitutes the protoplasm or discoplasm of the cell. 1900 W. Myers tr. P. Ehrlich & A. Lazarus Histol. Blood 50 The discoplasm [Ger. das Discoplasma] loses its power of retaining the hæmoglobin, and gives it up to the blood plasma in ever increasing quantity. discopodium n. Brit. /ˌdɪskə(ʊ)ˈpəʊdɪəm/ , U.S. /ˌdɪskoʊˈpoʊdiəm/ , /ˌdɪskəˈpoʊdiəm/ (pl. discopodia) [after scientific Latin discopodium (1843 or earlier)] Botany a stalk supporting a disc-shaped structure such as a fungal fruiting body or a floral receptacle. ΚΠ 1848 J. Lindley Gloss. Techn. Terms Bot. p. xxxiii Discopodium, the fruit or stalk on which some kinds of disk are elevated. 1895 F. W. Oliver et al. tr. A. Kerner von Marilaun Nat. Hist. Plants II. 308 The apothecum is transformed into a stalked cup or head-shaped discopodium. 1968 Bryologist 71 319 With its apical crater..the podetium would be a variant of the discopodia of the basic type. 2007 P. F. Cannon & P. M. Kirk Fungal Families of World Gloss. 422 Podetium, lichenized stem-like portion (stipe, or discopodium) bearing hymenial discs. discopodous adj. Brit. /dᵻˈskɒpədəs/ , U.S. /dəˈskɑpədəs/ [after scientific Latin Discopoda, suborder name ( P. Fischer in Man. de conchyliologie (1884) 653)] Zoology rare having a disc-shaped foot; spec. of or relating to a suborder Discopoda of aquatic snails.Apparently only attested in dictionaries or glossaries. ΚΠ 1896 N.E.D. at Disco- Discopodous, having the foot shaped as a disk; belonging to the section Discopoda of Gastropods. 1992 Acad. Press. Dict. Sci. & Technol. 657/1 Discopodous, having a disk-shaped foot. † discostomatous adj. [after scientific Latin Discostomata, former class name (W. Saville-Kent, cited in the source of quot. 1877, fuller publication 1878 in Ann. & Mag. Nat. Hist. 1 7)] Zoology Obsolete having a disc-shaped mouth; spec. of or relating to the (former) class Discostomata of Protozoa (in Saville-Kent's system), containing the sponges and the choanoflagellates. ΚΠ 1877 Zoologist 1 347 (title) The abstract of a ‘Monograph of the Gymnozoidal Discostomatous Flagellata, with a new Scheme of Classification of the Protozoa’, by Mr. W. Saville Kent, was read. 1886 Trans. Herts. Nat. Hist. Soc. 1883–85 3 Pl. VI (caption) Discostomatous Protozoa. discotriaene n. Brit. /ˌdɪskə(ʊ)ˈtrʌɪiːn/ , U.S. /ˌdɪskoʊˈtraɪˌin/ Zoology (in sponges) a triaene in which the divergent rays are united to form a disc. ΚΠ 1888 W. J. Sollas in Rep. Sci. Results Voy. H.M.S. Challenger: Zool. XXV. p. lvii Varieties of the Triæne... Discotriæne... The cladome is a disc in which separate cladi are not distinguishable; and the axial rods representing them extend but a short distance from the cladal origin. 1968 P. Brien in M. Florkin & B. T. Scheer Chem. Zool. II. i. i. 9 The branches may merge to form a disc (discotriaene). 2010 A. V. Ereskovsky Compar. Embryol. Sponges iii. 174 In advanced stages, the embryo is surrounded by a single layer of discotriaenes in which the shaft is inwardly directed. This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022). < comb. form1848
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