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From The Collaborative International Dictionary of English v.0.48:
Pulsatile \Pul"sa*tile\, a. [Cf. It. pulsatile, Sp. pulsatil.] 1. Capable of being struck or beaten; played by beating or by percussion; as, a tambourine is a pulsatile musical instrument. [1913 Webster] 2. Pulsating; throbbing, as a tumor. [1913 Webster]