| 释义 |
lepto-
combining form of Gr. λεπτός fine, small, thin, delicate, used in many terms of Zoology and Botany: leptocardian |-ˈkɑːdɪən| a. Zool. [Gr. καρδία heart], belonging to the Leptocardii, the lowest group of true vertebrates, having contractile pulsating sinuses instead of a heart; n., a vertebrate belonging to this group (Cent. Dict. 1889). leptocephalan |-ˈsɛfələn|, -cephalid |-ˈsɛfəlɪd| Ichthyol. [Gr. κεϕαλ-ή head], a fish of the family Leptocephalidæ. leptocephalic |-sɪˈfælɪk| a., having a narrow skull; exhibiting leptocephaly; Ichthyol., as the designation of certain flat-fish (cf. leptocephalid). leptocephaly |-ˈsɛfəlɪ|, narrowness of skull. leptodactyl |-ˈdæktɪl| Ornith. [Gr. δάκτυλος toe] a., having thin or slender toes; n., a bird with slender toes. leptoˈdactylous, a. [-ous], = prec. a. leptodermous |-ˈdɜːməs| a. Bot. [Gr. δέρµα skin], having thin skin, said of moss-capsules when pliable (Syd. Soc. Lex. 1888). leptoglossal |-ˈglɒsəl| a. Zool. [Gr. γλῶσσα tongue], of or pertaining to the division Leptoglossa of lizards, having slender tongues (Cent. Dict.). leptoglossate |-ˈglɒsət| a., leptoglossal; n., a lizard of this group (ibid.). ‖ leptomeningitis |-mɛnɪnˈdʒaɪtɪs| Path., inflammation of the pia mater and the arachnoid (the leptomeninges). ‖ leptophloem |-ˈfləʊɛm| Bot. [see phloem], in certain mosses (see quot.). leptophyllous |-ˈfɪləs| a. Bot. [Gr. ϕύλλον leaf], slender-leaved (Mayne Expos. Lex. 1855). leptoprosope |-ˈprɒsəʊp| [Gr. πρόσωπον face], narrowness of face; the condition of having a long narrow-faced skull (Cent. Dict.). Hence leptoproˈsopic a., having a long narrow face. leptorrhine |ˈlɛptəʊrɪn| a. [Gr. ῥῑν-, ῥίς nose], having a long narrow nose; having a nasal index of 47 or under; also leptoˈrrhinian, -ˈrrhinic adjs. ˈleptosperm |-spɜːm| [Gr. σπέρµα seed], a plant of the genus Leptospermum of myrtaceous shrubs (Cent. Dict.). ˌleptospoˈrangiate |-spəʊˈrænʒɪət| a. Bot. [see sporangium], having sporangia which are developed from a single epidermic cell. ‖ leptothrix |ˈlɛptəʊθrɪks| [Gr. θρίξ hair], ‘a fungus belonging to the Order Schizomycetes, consisting of very thin and long, indistinctly segmented, straight threads’ (Syd. Soc. Lex.); also attrib. leptoˈxylem Bot. [xylem], a structure in certain mosses (see quot.).
1842Brande Dict. Sci. etc., *Leptocephalans, Leptocephalidæ, the name of a family of fishes characterized by the smallness of the head, of which the genus Leptocephalus is the type.
1886Pop. Sci. Monthly XXIX. 114 Many young flat-fish..assume that peculiarly elongated and strange form known as *leptocephalic.
1882Q. Rev. Jan. 251 These *Leptocephalids are small, narrow, elongate.
1864Vogt's Lect. Man ii. 30 Platycephaly stands opposed to *leptocephaly, though connected with it by gradual transitions.
a1864Hitchcock (cited in Worcester), *Leptodactyl..Leptodactylous.
1855Mayne Expos. Lex., Leptodactylus, *leptodactylous.
1866A. Flint Princ. Med. (1880) 693 Sometimes inflammation of the pia mater is denominated *leptomeningitis, in distinction from pachymeningitis which is inflammation of the dura mater.
1889Bennett & Murray Cryptog. Bot. 146 A *leptophloem or rudimentary phloem, in which the storing up and conduction of the food-material takes place.
1889Garson in Jrnl. Anthrop. Inst. XVIII. 23 The midfacial index..in the three Yasinese skulls..is very constant and averages 54·2, making them dolichofacial, or *leptoprosopic.
1880Dawkins Early Man vii. 192 The *leptorhine rhinocerous. 1884J. E. Lee Romer's Bone Caves Ojcow 31 In both the Wierzchow skulls the nose is leptorrhine.
1878Bartley tr. Topinard's Anthrop. ii. ii. 257 The *leptorrhinians, with the nasal skeleton elongated. 1891Athenæum 25 July 132/3 Dr. Topinard communicates documents on the nasal index of the living... 49½ per cent...were leptorhinian..and 43 per cent. mesorhinian.
1887Garnsey Goebel's Classif. Plants 193 Two divisions of the Filicineae, the *Leptosporangiate and the Eusporangiate.
1877Bennett tr. Thomé's Bot. 259 The forms known as Termo, Bacterium, Vibrio, Spirillum, *Leptothrix, &c. 1882Pop. Sci. Monthly XX. 718 Bacteria attached end to end in a string form filaments of leptothrix. 1885Klein Micro-Organisms 89 Long leptothrix filaments composed of short joints. 1897Allbutt's Syst. Med. IV. 743 The leptothrix fungus and spores are almost invariably present in the concretions of tartar that gather round the teeth.
1889Bennett & Murray Cryptog. Bot. 146 A *leptoxylem or rudimentary xylem which serves for the conduction of the transpiration-current to the lower portion of the sporange furnished with stomates.
Add: leptomeninx |-ˈmɛnɪŋks| Anat. [meninx n.], pl. -meninges |-mɪˈnɪndʒiːz|, the arachnoid and pia mater considered together; usu. in pl. in same sense.
1889Cent. Dict., Leptomeninges. 1893Funk's Stand. Dict., Leptomeninx. 1899Allbutt's Syst. Med. VII. 712 The leptomeninges stripping, on the contrary, with undue ease. 1934R. R. Grinker Neurology iii. 62 Recent experiments have been interpreted to suggest that the primitive leptomeninx is of ectodermal origin. Ibid., The external layer of the leptomeninx lies underneath the dura mater. 1959Roizin & Kolb in Kies & Alvord ‘Allergic’ Encephalomyelitis i. 6 The lesions..were generally irregular in form and size, involving the gray and white matter of the cerebral cortex, and extending into the surrounding areas, including the periventricular regions, subarachnoid spaces and leptomeninges. 1977Lancet 9 July 90/1 Foci of round-cell infiltration were found in the leptomeninges and in the wall of small vessels intracerebrally. 1985C. R. Leeson et al. Textbk. Histol. (ed. 5) vii. 228/2 Pia and arachnoid have a similar structure and sometimes are regarded as a single layer called the leptomeninx or leptomeninges. |