| 单词 | ovule |
| 释义 | ovule (once / 7864 pages) n WORD FAMILY ovule: ovular, ovulate, ovules+/ovulate: ovulated, ovulates, ovulating, ovulation/ovulation: anovulation USAGE EXAMPLESFig wasps deposit pollen—and lay their own eggs—in the fig’s egg-bearing ovules. National Geographic(Sep 29, 2016) When water collects on this gametophyte, it releases amorous, mobile sperm cells that swim across the heart’s surface to fertilize the plant’s ovules, or eggs. New York Times(Dec 25, 2015) This is not metaphoric sperm: This very stationary tree produces a wriggling, swimming sperm cell capable of fertilizing female ginkgo ovules. New York Times(Oct 29, 2015) 1n a small or immature ovum Hyper egg cell, ovum the female reproductive cell; the female gamete 2n a small body that contains the female germ cell of a plant; develops into a seed after fertilization Hypo|Hyper amphitropous ovule a partly inverted ovule turned back 90 degrees on its stalk anatropous ovulea completely inverted ovule turned back 180 degrees on its stalk campylotropous ovulea curved ovule with the micropyle almost touching the funiculus orthotropous ovulea completely straight ovule with the micropyle at the apex seeda mature fertilized plant ovule consisting of an embryo and its food source and having a protective coat or testa reproductive structure the parts of a plant involved in its reproduction |
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