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From The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster] The heart of a viper or frog will continue to pulsate long after it is taken from the body. --E. Darwin. [1913 Webster]