- The nearly mature ovum after the first meiotic division has been completed and the second initiated; in most higher mammals, the second meiotic division is not completed unless fertilization occurs. [G. ootidion, a diminutive egg. See -id (2)]
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* * *oo·tid (oґo-tid) a mature oocyte; one of four cells derived from the two consecutive divisions of the primary oocyte, and corresponding to the spermatids that are derived from division of the primary spermatocyte. In mammals, the second maturation division is not completed unless fertilization occurs; hence the ootid has male as well as female pronuclear (haploid) elements.
Medical dictionary. 2011.
Look at other dictionaries:
ootid — ootid. См. оотид. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
ootid — [ō′ō tid, ō′ətid] n. [ OO + t + ID] a large, haploid cell produced at the second meiotic division, that quickly becomes an egg cell … English World dictionary
ootid — noun Etymology: irregular from o + id Date: 1904 an egg cell after meiosis … New Collegiate Dictionary
ootid — n. [Gr. oion, egg; eidos, form] One of the four meiotic products arising in oogenesis … Dictionary of invertebrate zoology
ootid — /oh euh tid/, n. Cell Biol. the cell that results from the meiotic divisions of an oocyte and matures into an ovum. [1905 10; OO + (SPERMA)TID] * * * … Universalium
ootid — noun The haploid cell, produced by meiotic division of a secondary oocyte, that is a nearly mature ovum … Wiktionary
ootid — n. cell which becomes an ovum just before fertilization (Biology) … English contemporary dictionary
ootid — oo·tid … English syllables
ootid — o•o•tid [[t]ˈoʊ ə tɪd[/t]] n. dvl an ovarian egg cell that results from oocyte division and matures into an ovum under certain conditions • Etymology: 1905–10 … From formal English to slang
ootid — noun mature ovum after penetration by sperm but before the formation of a zygote • Hypernyms: ↑ovum, ↑egg cell … Useful english dictionary