penis: the male urinary and copulatory organ, comprising a root, shaft, and at the extremity, glans penis and foreskin [from Latin,
penis, or tail]. The shaft or body of the penis consists of two parallel cylindrical bodies, the
corpora cavernosa, and beneath them, surrounding the urethra, the
corpus spongiosum. The penis in the male is the homologue of the clitoris in the female.
Dictionary of Sexology Project: Main Index