Spermatozoa :: Spermatozoa (pl. ) of Spermatozoo.

Spermatozoid :: Spermatozoid (n.) 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 spermatozoon. In plants the more usual term is antherozoid..

Spermatozooid :: Spermatozooid (n.) A spermatozoid.

Spermatozoon :: Spermatozoon (n.) Same as Spermatozoid.

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