priapus

The organ of copulation and urination in the male; formed of three columns of erectile tissue, two arranged laterally on the dorsum (corpora cavernosa penis) and one median ventrally (corpus spongiosum penis); the urethra traverses the latter; the extremity (glans penis) is formed by an expansion of the corpus spongiosum and is more or less completely covered by a free fold of skin (prepuce).

Synonym(s): intromittent organ, membrum virile, phallus (2) , priapus, virga

[L. tail]