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ovum 音標拼音: ['ovəm] n. 卵,卵子,卵形裝飾 卵,卵子,卵形裝飾 ovum n 1: the female reproductive cell; the female gamete [ synonym: { ovum}, { egg cell}] Ovum \ O" vum\ ([= o]" v[ u^] m), n.; pl. L. { Ova} ([= o]" v[. a]), E. { Ovums} ([= o]" v[ u^] mz). [ L., an egg. See { Oval}.] 1. ( Biol.) A more or less spherical and transparent cell, which by a process of multiplication and growth develops into a mass of cells, constituting a new individual like the parent; an egg, spore, germ, or germ cell. See Illust. of { Mycropyle}. [ 1913 Webster] Note: The ovum is a typical cell, with a cell wall, cell substance, nucleus, and nucleolus. In man and the higher animals the cell wall, a vertically striated membrane, is called the zona pellucida; the cell contents, the vitellus; the nucleus, the germinal vesicle; and the nucleolus, the germinal spot. The diameter of the ripe ovum in man and the domestic animals varies between 1- 200 and 1- 120 of an inch. [ 1913 Webster] 2. ( Arch.) One of the series of egg- shaped ornaments into which the ovolo is often carved. -- Gwilt. [ 1913 Webster]
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