(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.

androcyte antheridium antherozoid male gamete milt protein scum seed semen seminal fluid sperm sperm cell spermagonium spermatic fluid spermatid spermatiophore spermatium spermatocyte spermatogonium spermatophore spermatozoa spermatozoid spermatozoon