Source : Webster's Revised Unabridged Dictionary (1913)

Spermatozoid \Sper`ma*to*zo"id\, n. [Spermatozo["o]n + Gr. ???
   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 {spermatozo["o]n}. In
   plants the more usual term is {antherozoid}.

Source : WordNet®

spermatozoid
     n : a motile male gamete of a plant such as an alga or fern or
         gymnosperm [syn: {antherozoid}]