deltoid

[ del-toid ]
See synonyms for deltoid on Thesaurus.com
noun
  1. Anatomy. a large, triangular muscle covering the joint of the shoulder, the action of which raises the arm away from the side of the body.

adjective
  1. Anatomy. pertaining to or involving the deltoid.

  2. Also deltoidal. in the shape of a Greek capital delta (Δ); triangular.

Origin of deltoid

1
1675–85; <Greek deltoeidḗs delta-shaped, equivalent to délt(a) delta + -oeidēs-oid

Other words from deltoid

  • sub·del·toid, adjective

Words Nearby deltoid

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use deltoid in a sentence

British Dictionary definitions for deltoid

deltoid

/ (ˈdɛltɔɪd) /


noun
  1. the thick muscle forming the rounded contour of the outer edge of the shoulder and acting to raise the arm

adjective
  1. shaped like a Greek capital delta, Δ; triangular

Origin of deltoid

1
C18: from Greek deltoeidēs triangular, from delta

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012