Sper`ma*to*zo"id(?), n. [Spermatozon + Gr. e'i^dos form.] (Biol.) The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail. Called also spermatozon. In plants the more usual term is antherozoid.
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Tue 18th December 2018