The Collaborative International Dictionary of English v.0.48:
Polycrotic \Pol`y*crot"ic\ (p[o^]l`[i^]*kr[o^]t"[i^]k), a. [Poly- + Gr. krotei^n to beat.] (Physiol.) Of or pertaining to polycrotism; manifesting polycrotism; as, a polycrotic pulse; a polycrotic pulse curve. [1913 Webster]