deltoid

[ del-toid ]
/ ˈdɛl tɔɪd /
SEE SYNONYMS FOR deltoid ON THESAURUS.COM

noun

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

Anatomy. pertaining to or involving the deltoid.
Also deltoidal. in the shape of a Greek capital delta (Δ); triangular.

Origin of deltoid

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

OTHER WORDS FROM deltoid

sub·del·toid, adjective

Words nearby deltoid

delta wave, delta wing, delta-aminolevulinic acid, deltaic, deltiology, deltoid, deltoid ligament, deltoid muscle, deltoidal, delts, delubrum

Words related to deltoid

trilateral, cuneate, deltoidal, hastate, pyramidal, pyriform, trigonal

Example sentences from the Web for deltoid

British Dictionary definitions for deltoid

deltoid
/ (ˈdɛltɔɪd) /

noun

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

adjective

shaped like a Greek capital delta, Δ; triangular

Word Origin for deltoid

C18: from Greek deltoeidēs triangular, from delta

Medical definitions for deltoid

deltoid
[ dĕl′toid′ ]

adj.

Of or relating to the deltoid muscle.
Triangular in shape or outline.

n.

The deltoid muscle.