SPERMATOZOID

noun 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.