- A rare congenital anomaly in which the penis is partly or completely duplicated; may be symmetrical, or placed one above the other; often there are associated urogenital or other anomalies; occurs when two genital tubercles develop. May also be associated with exstrophy of the urinary bladder and splitting of the genital tubercle. SYN: bifid penis. [G. di-, two, + phallos, penis]
* * *di·phal·lus (di-falґəs) complete or incomplete duplication of the penis; often associated with urogenital anomalies such as exstrophy of bladder; called also bifid or double penis.
Medical dictionary. 2011.