endophallus

Noun

 * 1)  The inner wall of the aedeagus of an insect, derived during embryological development by the fusion of paired genital papillae to form a medial tube. The endophallus is eversible and flexible, is the actual intromittent organ, and sometimes has backward-orientated denticulations to achieve a firm hold on the vaginal walls of the female.

Related terms

 * endophallic