Source : Webster's Revised Unabridged Dictionary (1913)

Pulsate \Pul"sate\, v. i. [imp. & p. p. {Pulsated}; p. pr. & vb.
   n. {Pulsating}.] [L. pulsatus, p. p. of pulsare to beat,
   strike, v. intens. fr. pellere to beat, strike, drive. See
   {Pulse} a beating, and cf. {Pulse}, v.]
   To throb, as a pulse; to beat, as the heart.

         The heart of a viper or frog will continue to pulsate
         long after it is taken from the body.    --E. Darwin.

Source : WordNet®

pulsating
     adj : expanding and contracting rhythmically as to the beating of
           the heart; "felt the pulsating artery"; "oh my beating
           heart" [syn: {beating}, {pulsing}]