| 单词 | deltoid | 
| 释义 | Word Frequency 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 2.  shaped like a Greek capital delta, Δ; triangular  Word originC18: from Greek deltoeidēs triangular, from delta | 
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