| 单词 | ovulate |
| 释义 | ▪ I. ovulate, a.|ˈəʊvjuːlət|
[f. mod.L. ōvul-um ovule + -ate2.]
Having or containing an ovule or ovules. (Chiefly in comb. with an element indicating the number of ovules in the ovary of a plant.)
1861Bentley Man. Bot. 329 They [ovules] may be very numerous, when it [the ovary] is said to be multi-ovulate or indefinite. Ibid. 330 When the ovary..has two ovules (biovulate). 1892in Syd. Soc. Lex.
▪ II. ovulate, v.|ˈəʊvjuːleɪt, ˈɒv-|
[f. as prec. + -ate3.]
a. intr. To produce ovules or ova; to discharge ova from the ovary. Said of an organism and of a Graafian follicle. Hence of an ovum: to be discharged.
1888H. N. Martin in B. C. Hirst Syst. Obstetr. I. 92 Women who have never menstruated have borne children: they must have ovulated without menstruating. 1890in Cent. Dict. 1928Q. Jrnl. Exper. Physiol. XVIII. 197 The group of follicles which will ovulate at an œstrus period undergo nearly their whole maturation growth after the time when the œstrus stimulus becomes operative. 1959New Biol. XXX. 21 The ovary at the time of ovulation looks like a bunch of grapes, but with the difference that all the grapes, or follicles, are of different size. The largest will ovulate first. 1968D. W. Wood Animal Physiol. xiii. 303 Many [mammals] ovulate spontaneously as part of the oestrus cycle, but others require the stimulus of copulation before they will ovulate. Such induced ovulators include the ferret, the cat and the rabbit. 1974Biol. of Reproduction X. 199/1 Amphibia are good subjects for in vitro studies of ovulation, for mature ovaries can be maintained in simple salt solutions at room temperature and can be induced to ovulate by the addition of crude extracts of..pituitary glands.
b. trans. To discharge (an ovum).
1924Amer. Jrnl. Physiol. LXIX. 587 The periodic formation of new ova in the adult ovary makes it unnecessary to consider that ova in the immature ovary lie dormant until they either degenerate or are ovulated. 1934Science 16 Nov. 462/1 Our observations would indicate that it is not necessary for the egg to be ovulated directly into the infundibulum. 1973Nature 13 July 72/1 One species, the plains viscacha (Lagostomus maximus), has a bizarre reproductive habit in that it ovulates between 200 and 800 eggs from ovaries that look more like those of a fish than a mammal.
Hence ˈovulated ppl. a., ˈovulating vbl. n.
1910F. H. A. Marshall Physiol. Reproduction iv. 133 The second spindle is formed at about the ovulating stage, and the second polar body is discharged into the interior of the Fallopian tube. 1940Record of Proc. Amer. Soc. Animal Production 302 (heading) Potential fertility of artificially matured and ovulated ova in cattle. 1959New Biol. XXX. 21 The ovulating hormone..causes the follicle to split along the line of the stigma, thus releasing the mature yolk from the ovary. 1970Sci. Jrnl. June 94/1 This can be righted by supplying the hormone artificially and the ovulated eggs can then be fertilized. 1972Amer. Jrnl. Veterinary Res. XXXIII. 1589, 25 ewes were given estradiol to induce release of endogenous ovulating hormone. |
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