parthenogenesis par`the*no*gen"e*sis (p[aum]r`th[-e]*n[-o]*j[e^]n"[-e]*s[i^]s), n. [Gr. parqe`nos a virgin + E. genesis.] 1. (Biol.) The production of new individuals from virgin females by means of ova which have the power of developing without the intervention of the male element; the production, without fertilization, of cells capable of germination. It is one of the phenomena of alternate generation. Cf. {Heterogamy}, and {Metagenesis}. [1913 Webster]

2. (Bot.) The production of seed without fertilization, believed to occur through the nonsexual formation of an embryo extraneous to the embryonic vesicle. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Parthenogenesis — (from the Greek παρθένος parthenos , virgin , + γένεσις genesis , creation ) is an asexual form of reproduction found in females where growth and development of embryos or seeds occurs without fertilization by a male. The offspring produced by… …   Wikipedia

  • parthenogenesis — parthenogenesis. См. девственное размножение. (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.

  • Parthenogenĕsis — (gr.), so v.w. Generationswechsel, s.u. Metamorphose …   Pierer's Universal-Lexikon

  • Parthenogenĕsis — (gr.), heißt auch das Entstehen von Thieren aus unbefruchteten Eiern, s.u. Zeugung S. 564 …   Pierer's Universal-Lexikon

  • Parthenogenesis — (griech., Jungfernzeugung), eine Art der Fortpflanzung, bei der sich das Ei ohne Befruchtung durch den Samen entwickelt. Bei der P. muß also wie bei der zweigeschlechtlichen Fortpflanzung ein weibliches Tier vorhanden sein, aber nur dieses allein …   Meyers Großes Konversations-Lexikon

  • Parthenogenesis — Parthenogenĕsis (grch.), Jungfernzeugung, die Hervorbringung entwicklungsfähiger Eier oder lebendiger Junger ohne vorausgegangene Begattung (bes. bei Krustazeen und Insekten). – Vgl. von Siebold (1856), Karsten (1888), Taschenberg (1892) …   Kleines Konversations-Lexikon

  • parthenogenesis — (n.) reproduction without fertilization, 1849, from Gk. parthenos virgin, of unknown origin, + genesis (see GENESIS (Cf. genesis)) …   Etymology dictionary

  • parthenogenesis — ► NOUN Biology ▪ reproduction from an ovum without fertilization, especially in some invertebrates and lower plants. DERIVATIVES parthenogenetic adjective. ORIGIN from Greek parthenos virgin + genesis creation …   English terms dictionary

  • parthenogenesis — [pär΄thə nō΄jen′ə sis] n. [ModL < Gr parthenos, maiden, virgin + genesis, origin: see GENESIS] reproduction by the development of an unfertilized ovum, seed, or spore, as in certain insects or algae: it may be induced artificially by chemical… …   English World dictionary

  • Parthenogenesis — Development of a germ cell without fertilization. This is what happens in the formation of ovarian teratomas (dermoid cysts). All of the chromosomes in these benign tumors of the ovary come from the mother. The counterpart of the ovarian teratoma …   Medical dictionary

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