11 letters · 22 points in Scrabble
noun abnormally rapid heartbeat (over 100 beats per minute)
originLearned borrowing from New Latin tachycardia, from Ancient Greek ταχύς (takhús, “swift”) + καρδία (kardía, “heart”). By surface analysis, tachy- + -cardia. Compare French tachycardie.
Etymology from Wiktionary, CC BY-SA 3.0