Meanings
Synonyms & antonyms
nounA triangular muscle on the human shoulder.
Similar
colloquiallythe deltoid
More synonyms by meaning
nouna large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm
Similar
deltoidmusculus deltoideus
Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
Short for deltoideus + muscle. Previously the deltoideus muscle and musculus deltoideus.
Full word history & related roots →Cite this entry
APA
deltoid muscle. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/deltoid%20muscle
MLA
“deltoid muscle.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/deltoid%20muscle. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “deltoid muscle,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/deltoid%20muscle.
Source: deltoid muscle on Wiktionary, CC BY-SA 4.0.