Definitions for: Deltoid

[n] a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm
[adj] of a leaf shape; suggesting a capital delta, with a point at the apex

Webster (1913) Definition: Del"toid, a. [Gr. deltoeidh`s delta- shaped; de`lta
the name of the letter [Delta] + e'i^dos form: cf. F.
delto["i]de. See Delta.]
Shaped like the Greek [Delta] (delta); delta-shaped;
triangular.

Deltoid leaf (Bot.), a leaf in the form of a triangle with
the stem inserted at the middle of the base.

Deltoid muscle (Anat.), a triangular muscle in the shoulder
which serves to move the arm directly upward.

Synonyms: deltoid muscle, musculus deltoideus, simple, unsubdivided

See Also: rotator cuff, skeletal muscle

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