systole (n.)youdaoicibaDictYouDict[systole 词源字典]
"periodic contraction of the heart and arteries," 1570s, from Greek systole "a drawing together, contraction," from syn- "together" (see syn-) + stem related to stellein "to bring together, draw in; to put, set, place" (see diastole).[systole etymology, systole origin, 英语词源]