Source : Webster's Revised Unabridged Dictionary (1913)

Cremaster \Cre*mas"ter\ (kr?-m?s"t?r), n. [NL., from Gr. ???,
   fr. ???? to hang.]
   1. (Anat.) A thin muscle which serves to draw up the
      testicle.

   2. (Zo["o]l.) The apex of the last abdominal segment of an
      insect.