deltoid


Concise Oxford English Dictionary © 2008 Oxford University Press:
deltoid /ˈdɛltɔɪd/
adjective technical
  • 1 triangular.
  • 2 denoting a thick triangular muscle covering the shoulder joint and used for raising the arm away from the body.
noun a deltoid muscle, or one of the three parts of a deltoid muscle.
– origin C18: from Fr. deltoïde, or via mod. L. from Gk deltoeidēs.
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