polar body

polar body
Cell Biol.
one of the minute cells arising from the unequal meiotic divisions of the ovum at or near the time of fertilization.

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Universalium. 2010.

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Look at other dictionaries:

  • Polar body — Polar Po lar, a. [Cf. F. polaire. See {Pole} of the earth.] 1. Of or pertaining to one of the poles of the earth, or of a sphere; situated near, or proceeding from, one of the poles; as, polar regions; polar seas; polar winds. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • polar body — n a cell that separates from an oocyte during meiosis: a) one containing a nucleus produced in the first meiotic division called also first polar body b) one containing a nucleus produced in the second meiotic division called also second polar… …   Medical dictionary

  • polar body — polar body. См. полярное тельце. (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.

  • polar body — n. a minute cell cast off when a primary oocyte undergoes meiotic division to produce a secondary oocyte and again when the secondary oocyte divides to produce an ovum …   English World dictionary

  • Polar body — A polar body is a cell structure found inside an ovum. Both animal and plant ova possess it. Asymmetrical cell division (cytokinesis) leads to the production of polar bodies during oogenesis. To conserve nutrients, the majority of cytoplasm is… …   Wikipedia

  • polar body — In animals each meiotic division of the oocyte leads to the formation of one large cell (the egg) and a small polar body as the other cell. Polar body formation is a consequence of the very eccentric position of the nucleus and the spindle …   Dictionary of molecular biology

  • polar body — noun Date: 1888 a cell that separates from an oocyte during meiosis and that contains a nucleus produced in the first or second meiotic division and very little cytoplasm …   New Collegiate Dictionary

  • polar body — A minute, functionless cell produced and discarded during the development of an oocyte …   Dictionary of invertebrate zoology

  • polar body — noun One of the small cells that are by products of the meiosis that forms an egg …   Wiktionary

  • polar body — noun Biology each of the small cells which bud off from an oocyte at the two meiotic divisions and do not develop into ova …   English new terms dictionary

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