actino-comb. form

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

Origin: Of multiple origins. Partly a borrowing from Latin. Partly a borrowing from Greek. Etymons: Latin actīno-; Greek ἀκτινο-.

Etymology: < classical Latin actīno- (in e.g. actīnophoros : see actinophorous adj.) and its etymon Hellenistic Greek ἀκτινο-, combining form (in e.g. ἀκτινοβόλος sending forth rays: see actinobolism n.) of ancient Greek ἀκτῖν- , ἀκτίς ray, beam; compare -o- connective.Attested in borrowings and adaptations of Latin words from the 17th cent. (earliest in actinobolism n.) and subsequently also in loans and adaptations from French (as e.g. actinote n., actinology n., etc.) and German (as actinomycosis n.). Formations in English are found from the end of the 18th cent. (earliest in actinolite n.) and are more numerous from the mid 19th cent. in scientific vocabulary. This element combines with elements of Latin or Greek origin. Compare French actino- (formations in which are found from at least the late 18th cent.), German aktino- (formations in which are found from at least the 2nd half of the 19th cent.).

1. Forming terms relating to rays or radial symmetry in living organisms.

† actinomere n. Zoology Obsolete a radial segment; a portion of the surface of a radially symmetrical animal (in quot., an ovate ctenophore) delineated by lines reaching from pole to pole (cf. note at actinal adj.).

ΚΠ

1861 J. R. Greene Man. Animal Kingdom II. iii. 143 Eight meridional bands, or ‘ctenophores’, bearing the comb-like fringes, or characteristic organs of locomotion, traverse, at definite intervals, the interpolar region, which they divide into an equal number of lune-like lobes, termed the ‘actinomeres’.

actinostele n.

Brit.

/ˈaktᵻnə(ʊ)stiːl/

/ˈaktᵻnə(ʊ)ˌstiːli/

U.S.

/ˈæktənoʊˌstil/

/ˈæktənoʊˌstili/

Botany a type of protostele in which the central core of xylem is star-shaped or lobed in cross-section.

ΚΠ

1902 G. Brebner in Ann. Bot. 16 519 In most roots the arrangement of the xylem and the phloem is ‘radial’, hence the term actinostele seems appropriate.

1969 F. E. Round Introd. Lower Plants xi. 128 Some species have actinosteles whilst in others the xylem has fragmented.

1992 M. Ingrouille Diversity & Evol. Land Plants 73 Protosteles are of three kinds: a haplostele, an actinostele and a plectostele.

2. Forming terms relating to radiant energy.

actinodermatitis n.

Brit.

/ˌaktᵻnə(ʊ)ˌdəːməˈtʌɪtᵻs/

U.S.

/ˌæktənoʊˌdərməˈtaɪdəs/

now rare = radiation dermatitis n. at radiation n. Compounds 1c.

ΚΠ

1906 W. A. N. Dorland Illustr. Med. Dict. (ed. 4) 27/1 Actinodermatitis, X-ray dermatitis.

1933 Amer. Jrnl. Cancer 18 167 The condition [sc. carcinoma in situ] may also be found in association with senile keratosis, arsenical keratosis, chemical dermatosis, actinodermatitis, and xeroderma pigmentosum.

1998 S. E. Order & S. S. Donaldson Radiation Therapy Benign Dis. (ed. 2) 88/5 (table) Such things as atrophy of the face, problems in dental development, and actinodermatitis were common complications in the non-surgical series.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online December 2021).

单词	actino-
释义	actino-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Origin: Of multiple origins. Partly a borrowing from Latin. Partly a borrowing from Greek. Etymons: Latin actīno-; Greek ἀκτινο-. Etymology: < classical Latin actīno- (in e.g. actīnophoros : see actinophorous adj.) and its etymon Hellenistic Greek ἀκτινο-, combining form (in e.g. ἀκτινοβόλος sending forth rays: see actinobolism n.) of ancient Greek ἀκτῖν- , ἀκτίς ray, beam; compare -o- connective.Attested in borrowings and adaptations of Latin words from the 17th cent. (earliest in actinobolism n.) and subsequently also in loans and adaptations from French (as e.g. actinote n., actinology n., etc.) and German (as actinomycosis n.). Formations in English are found from the end of the 18th cent. (earliest in actinolite n.) and are more numerous from the mid 19th cent. in scientific vocabulary. This element combines with elements of Latin or Greek origin. Compare French actino- (formations in which are found from at least the late 18th cent.), German aktino- (formations in which are found from at least the 2nd half of the 19th cent.). 1. Forming terms relating to rays or radial symmetry in living organisms. † actinomere n. Zoology Obsolete a radial segment; a portion of the surface of a radially symmetrical animal (in quot., an ovate ctenophore) delineated by lines reaching from pole to pole (cf. note at actinal adj.). ΚΠ 1861 J. R. Greene Man. Animal Kingdom II. iii. 143 Eight meridional bands, or ‘ctenophores’, bearing the comb-like fringes, or characteristic organs of locomotion, traverse, at definite intervals, the interpolar region, which they divide into an equal number of lune-like lobes, termed the ‘actinomeres’. actinostele n. Brit. /ˈaktᵻnə(ʊ)stiːl/ , /ˈaktᵻnə(ʊ)ˌstiːli/ , U.S. /ˈæktənoʊˌstil/ , /ˈæktənoʊˌstili/ Botany a type of protostele in which the central core of xylem is star-shaped or lobed in cross-section. ΚΠ 1902 G. Brebner in Ann. Bot. 16 519 In most roots the arrangement of the xylem and the phloem is ‘radial’, hence the term actinostele seems appropriate. 1969 F. E. Round Introd. Lower Plants xi. 128 Some species have actinosteles whilst in others the xylem has fragmented. 1992 M. Ingrouille Diversity & Evol. Land Plants 73 Protosteles are of three kinds: a haplostele, an actinostele and a plectostele. 2. Forming terms relating to radiant energy. actinodermatitis n. Brit. /ˌaktᵻnə(ʊ)ˌdəːməˈtʌɪtᵻs/ , U.S. /ˌæktənoʊˌdərməˈtaɪdəs/ now rare = radiation dermatitis n. at radiation n. Compounds 1c. ΚΠ 1906 W. A. N. Dorland Illustr. Med. Dict. (ed. 4) 27/1 Actinodermatitis, X-ray dermatitis. 1933 Amer. Jrnl. Cancer 18 167 The condition [sc. carcinoma in situ] may also be found in association with senile keratosis, arsenical keratosis, chemical dermatosis, actinodermatitis, and xeroderma pigmentosum. 1998 S. E. Order & S. S. Donaldson Radiation Therapy Benign Dis. (ed. 2) 88/5 (table) Such things as atrophy of the face, problems in dental development, and actinodermatitis were common complications in the non-surgical series. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online December 2021). < comb. form1861
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