- heart, pump, ticker - the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body; "he stood still, his heart thumping wildly"
--1 is a kind of internal organ, viscus
--1 is a part of circulatory system, cardiovascular system
--1 has parts:
--1 has particulars: athlete's heart; biauriculate heartcoronary artery, arteria coronaria; cardiac muscle, heart muscle; heart valve, cardiac valve; valve - watch, ticker - a small portable timepiece
--2 is a kind of timepiece, timekeeper
--2 has parts:
--2 has particulars:crystal, watch crystal, watch glass; face; movement; watch case analog watch; digital watch; hunter, hunting watch; pendulum watch; pocket watch; stem-winder; wristwatch, wrist watch Derived form: verb tick2 - ticker, stock ticker - character printer that automatically prints stock quotations on tickertape
--3 is a kind of character printer, character-at-a-time printer, serial printer