phimosis /fīmō″sis/ [Gk, muzzle] , tightness of the prepuce of the penis that prevents the retraction of the foreskin over the glans. The condition is usually congenital but may be the result of infection. Circumcision is the usual treatment. An analogous condition of the clitoris occurs rarely. Compare paraphimosis. See also phimosis vaginalis.
