Index of English words, starting with "sp"

(1) - Spermatogenesis (n.) The development of the spermatozoids.

(1) - 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.

(1) - 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.
(2) - Spermatophore (n.) Same as Spermospore.