Source : Webster's Revised Unabridged Dictionary (1913)

Clitoris \Cli"to*ris\ (? or ?), n. [NL., fr. Gr. ?, fr. ? to
   shut up. It is concealed by the labia pudendi.] (Anat.)
   A small organ at the upper part of the vulva, homologous to
   the penis in the male.

Source : WordNet®

clitoris
     n : a female sexual organ homologous to the penis [syn: {clit},
         {button}]