单词 | ovotestis |
释义 | ovotestisn. 1. Zoology. A reproductive organ of many molluscs and some other invertebrates which produces both ova and spermatozoa. ΘΚΠ the world > animals > invertebrates > bodies or parts > [noun] > hermaphrodite gland ovotestis1877 1877 T. H. Huxley Man. Anat. Invertebrated Animals viii. 515 The Pulmonata are hermaphrodite. The generative gland is an ovotestis, and is composed of branched tubuli, from the cellular contents of which both ova and spermatozoa are developed. 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 113 The hermaphrodite gland or ovo-testis [in the Edible Snail]. 1985 Cambr. Encycl. Life Sci. ii. 96/1 Some animals, such as snails, are hermaphrodite, and both sperm and ovum are produced by an organ called an ovotestis. 1994 E. E. Ruppert & R. D. Barnes Invertebr. Zool. (ed. 6) x. 418/1 Pulmonates and opisthobranchs are mostly simultaneous hermaphrodites, although the ovotestis may not produce sperm and eggs at the same time. 2. Medicine. An abnormal organ combining features of an ovary and a testis. ΚΠ 1923 Proc. Royal Soc. B. 95 259 It [sc. the chicken]..was entirely bisexual; it never laid an egg. An oviduct and an unpaired gonad were present, and the latter proved to be an ovotestis. 1977 Time 5 Dec. 48/3 She was a hermaphrodite, with..an ovary on one side and a combination of ovary and testis on the other. The doctors promptly removed the ovotestis, thereby reducing the danger of cancer and ensuring that she would be an unambiguous female. 1998 Mother Jones Apr. 29/2 What we're finding in fish and birds and even mammals now are ovotestes, or testes that have ovarian tissue in them. This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022). < n.1877 |
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