scapula (n.)youdaoicibaDictYouDict[scapula 词源字典]
"shoulder blade," 1570s, Modern Latin, from Late Latin scapula "shoulder," from Latin scapulae (plural) "shoulders, shoulder blades," perhaps originally "spades, shovels," on notion of similar shape, but animal shoulder blades might have been used as scraping tools in primitive times, from PIE *skap-, variant of *skep- "to cut, scrape" (see scabies).[scapula etymology, scapula origin, 英语词源]