| 释义 |
ovule|ˈəʊvjuːl|
[a. F. ovule (Mirbel 1808), ad. mod.L. ōvulum, dim. of ōvum egg.]
1. Bot. The rudimentary seed in a phanerogamous plant; the body which contains the female germ-cell, and after fertilization becomes a seed; usually formed as a rounded or oval outgrowth of a carpel, and in angiosperms inclosed (one or more) in an ovary.
1830Lindley Nat. Syst. Bot. 75 Its ovarium contains, instead of three ovules adhering to a central placenta, one only, which is pendulous. 1842Gray Struct. Bot. vi. §1 (1880) 166 The Ovary..contains the Ovules, or bodies destined to become seeds. 1854S. Thomson Wild Fl. i. (ed. 4) 72 The young seeds, or ovules, as they are named before they have been subjected to the fertilizing influence of the pollen.
2. Zool. and Physiol.
a. The ovum or female germ-cell of an animal, esp. when very small as in mammals; spec. the unfertilized ovum.
1857Bullock Cazeaux' Midwif. 71 The ovule is completely formed in the ovary during the earlier years of life. 1871T. R. Jones Anim. Kingd. (ed. 4) 131 The ovules have been seen to escape by the mouth; and this..appears to be the general mode of parturition in all the Actinoid polyps.
b. ovules of Naboth: dilated mucous follicles in the neck of the uterus, supposed by the Saxon physician Martin Naboth (1675–1721) to be ova.
[1831: see ovulum 2.] 1892in Syd. Soc. Lex. |