"rhomboid" in the noun sense
a parallelogram with adjacent sides of unequal lengths an oblique-angled parallelogram with only the opposite sides equal
2. rhomboid, rhomboid muscle
any of several muscles of the upper back that help move the shoulder blade
"rhomboid" in the adjective sense
1. rhomboid, rhomboidal
shaped like a rhombus or rhomboid
Source: WordNet® (An amazing lexical database of English)
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