seed sac

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• Seed — A seed Audio IPA|en us seed.ogg|/ˈsiːd/ (in some plants, referred to as a kernel) is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and… …   Wikipedia

• seed and fruit — ▪ plant reproductive part Introduction       respectively, the characteristic reproductive (reproductive system, plant) body of both angiosperms (flowering plants) and gymnosperms (conifers, cycads, and ginkgos) and the ovary that encloses it.… …   Universalium

• sac — n baglike structure, pocket, pouch, Anat., Zool. bursa, Anat., Zool. capsule; vesicle, cyst; bladder, Anat. vesica; blister, bleb; Bot. cell, Bot. theca, Biol., Anat. loculus; Both Anat. saccule, sacculus; pod, seed vessel, legume, Bot. follicle …   A Note on the Style of the synonym finder

• 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

• pollen sac — noun : one of the sacs in a seed plant that contain the pollen and that are initially four in number but are commonly reduced to two by disintegration of the intervening walls in the mature anther * * * Bot. one of the cavities in an anther in… …   Useful english dictionary

• Poison sac — Poison Poi son, n. [F. poison, in Old French also, a potion, fr. L. potio a drink, draught, potion, a poisonous draught, fr. potare to drink. See {Potable}, and cf. {Potion}.] 1. Any agent which, when introduced into the animal organism, is… …   The Collaborative International Dictionary of English

• 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

• 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 — 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

• pollen sac — noun Date: 1875 one of the pouches of a seed plant anther in which pollen is formed …   New Collegiate 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