Spermatogonium :: Spermatogonium (n.) A primitive seminal cell, occuring in masses in the seminal tubules. It divides into a mass (spermosphere) of small cells (spermoblast), which in turn give rise to spermatozoids..
Spermatoid :: Spermatoid (a.) Spermlike; resembling sperm, or semen..
Spermatophore :: Spermatophore (n.) A capsule or pocket inclosing a number of spermatozoa. They are present in many annelids, brachiopods, mollusks, and crustaceans. In cephalopods the structure of the capsule is very complex..
Spermatophorous :: Spermatophorous (a.) Producing seed, or sperm; seminiferous; as, the so-called spermatophorous cells..
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..