三角肌

[ noun ]
a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm
<noun.body>

Deltoid \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}.]
1. 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 large triangular muscle covering
the shoulder joint, which serves to raise the arm directly
upward.

2. of or pertaining to the {deltoid muscle}.
[PJC]