Definition of "balanus"

GLANS, in anatomy, the anterior extremity of the penis, called by other different names, as the head of the penis, the nut of the penis, and the balanus of the penis.

1763, A New and Complete Dictionary of Arts and Sciences

There is both a local and a general predisposition to Lues Venerea: Jews and Mahometans, from the constant exposure of the glans and prepuce, have the cuticle of the balanus of much firmer texture than those who have not been circumcised.

1806, John Howard, Practical observations, page 21

[...] and stretches into the balanus of the penis.

1998, Vascular Diagnosis with Ultrasound