| 释义 |
vitelline, a. and n.|vɪˈtɛlaɪn, -ɪn, vaɪ-|
Also 5–6 vitellyn(e, 6 vytellyn, 7 vitellin.
[ad. med.L. vitellīn-us, f. L. vitell-us vitellus. Cf. OF. vitellin (in sense 1).]
A. adj.
1. Coloured like the yolk of an egg; deep-yellow with a tinge of red. In early use spec. of bile.
a1412Lydg. Two Merchants 307 Yif of colre he take his groundement Pure or vnpure, citryn or vitellyne. c1530Judic. Urines ii. viii. 33 Color Prassyn is gendred of a color vitellyn. Ibid. ix. 36 b, Coler citrin & Coler vytellyn be all one. 1596P. Barrough Meth. Physick (ed. 3) 393 Matter cholericke and filthie (as one would say) vitelline, the which causeth feuers. 1666G. Harvey Morbus Angl. xxv. (1672) 56 If we should commit the first of these, namely yellow, or vitellin choler to the test. 1684tr. Bonet's Merc. Compit. vi. 244 A yellow colour arises, which indicates vitelline Bile. 1887W. Phillips Brit. Discomycetes 144 Hymenium vitelline; stem rather long.
2. Biol. Of or belonging to the vitellus or yolk of an egg.
1835–6Todd's Cycl. Anat. I. 545/1 Only the..oily particles of the vitelline nidus could be expected to be seen. 1849Owen Parthenogenesis 73 An ovum..may contain a supplementary nutrient vitelline mass, properly called yelk. 1883Science I. 451/2 This sac..was connected with the foetal vascular system by a vitelline artery and two veins.
b. vitelline membrane, vitelline sac, the transparent membrane which surrounds the yolk of an egg; the yolk-sac; the investing membrane of the embryo.
1845Todd & Bowman Phys. Anat. I. 48 The first, or the vitelline membrane of the ovum, is the wall of a cell. 1861J. R. Greene Man. Anim. Kingd., Cœlent. 15 In addition to these parts, many ova are provided with an outer envelope, known as the yolk-sac or ‘vitelline membrane’. 1880Günther Fishes 166 Generally the vitelline sac of the embryoes is free.
B. n. The yolk, the vitellary substance.
1891Cent. Dict.
Hence † vitellinous a. (See quot.) Obs.
1786Abercrombie Arr. 35 in Gard. Assist., Vitellinous, or yellow barked [willow-tree]. |