Etymology
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scapula (n.)

in anatomy, "shoulder blade," 1570s, Modern Latin, from Late Latin scapula "the shoulder," from Latin scapulae (plural) "shoulders, shoulder blades," perhaps originally "spades, shovels," on the notion of similar shape (or of the animal shoulder blades used as scraping tools in primitive times), from PIE *skap-, variant of *skep- "to cut, scrape" (see scabies).

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Definitions of scapula

scapula (n.)
either of two flat triangular bones one on each side of the shoulder in human beings;
Synonyms: shoulder blade / shoulder bone
From wordnet.princeton.edu