phimosis

from WordNet (r) 3.0 (2006)

phimosis
    n 1: an abnormal tightness of the foreskin preventing retraction
         over the glans

from The Collaborative International Dictionary of English v.0.48

Phimosis \Phi*mo"sis\, n. [NL., fr. Gr. ? a muzzling, fr. ?
   muzzle.] (Med.)
   A condition of the penis in which the prepuce can not be
   drawn back so as to uncover the glans penis.
   [1913 Webster]