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OVUM - Definiția din dicționar

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O"vum (&ō;"vŭm), n.; pl. L. Ova (&ō;"v&adot_;), E. Ovums (&ō;"vŭmz). [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]

&hand_; 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]