embryo sac
noun Date: 1844 the female gametophyte of a seed plant consisting of a thin-walled sac within the nucellus that contains the egg nucleus and other nuclei which give rise to endosperm on fertilization

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • embryo sac — n. Bot. the female gametophyte of a flowering plant, consisting typically of a microscopic elongated sac that is situated within the ovule and contains eight nuclei in seven cells: it gives rise to the embryo and endosperm of the seed after… …   English World dictionary

  • Embryo sac — Em bry*o sac (Bot.) See under {Embryonic}. [1913 Webster] …   The Collaborative International Dictionary of English

  • embryo sac — embryo sac. См. зародышевый мешок. (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.

  • embryo sac — em′bryo sac n. bot (in flowering plants) a large cell of the rudimentary seed, within which the embryo develops Also called megaspore …   From formal English to slang

  • embryo-sac — emˈbryo sac noun The megaspore of a flowering plant, one of the cells of the nucellus • • • Main Entry: ↑embryo …   Useful english dictionary

  • embryo sac — Bot. the megaspore of a seed bearing plant, situated within the ovule, giving rise to the endosperm and forming the egg cell or nucleus from which the embryo plant develops after fertilization. [1870 75] * * * …   Universalium

  • embryo sac — /ˈɛmbrioʊ sæk/ (say embreeoh sak) noun the gametophyte of a seed bearing plant, being situated within the ovule, giving rise to the endosperm or supposed female prothallium, and forming the cell in which the embryo is developed …   Australian English dictionary

  • embryo sac — noun : the female gametophyte of a seed plant consisting of a thin walled sac within the nucellus that typically develops from a single functional megaspore and contains several meiotically reduced nuclei which lack separating cell walls and… …   Useful english dictionary

  • embryo sac — The mature female gametophyte in angiosperms. Generally a seven celled structure two synergids, one egg cell, three antipodal cells (each with a single haploid nucleus) and one endosperm mother cell with two haploid nuclei …   Glossary of Biotechnology

  • embryo sac cell — embryo sac cell. См. клетка зародышевого мешка. (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.

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