Source : Webster's Revised Unabridged Dictionary (1913)

Ejaculator \E*jac"u*la`tor\, n. [NL. See {Ejaculate}.] (Anat.)
   A muscle which helps ejaculation.

Source : WordNet®

ejaculator
     n 1: a man who ejaculates semen
     2: a speaker who utters a sudden exclamation