a. [ L. systalticus drawing together, Gr. &unr_;, from &unr_; to draw together. Cf. Sustaltic, Systole. ] (Physiol.) Capable of, or taking place by, alternate contraction and dilatation;
a. [ Thermo- + systaltic. ] (Physiol.) Influenced in its contraction by heat or cold; -- said of a muscle. [ 1913 Webster ]