deltoid muscle deltoid leaf • deltoid tuberosity · · · Info · Definitions · Synonyms · Characters · · deltoid muscle · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm. Synonyms: deltoid, deltoid muscle, musculus deltoideus. · · Noun Definition 1 Synonyms · · · deltoid · · Synonym 1 musculus deltoideus · · Synonym 2 Characters · · space U+0020 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075