The Collaborative International Dictionary of English v.0.48:

Gonococcus \Gon`o*coc"cus\, n. [NL., fr. Gr. ? semen, the
   genitals + NL. & E. coccus.] (Med.)
   A microorganism (Neisseria gonnorrhoeae) of the genus
   Neisseria (formerly Micrococcus), found in the secretion
   in gonorrhea, and constituting the cause of this disease.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

gonococcus
    n 1: the pus-producing bacterium that causes gonorrhea [syn:
         gonococcus, Neisseria gonorrhoeae]