musculus rhomboideus major mus·cu·lusr·homboideusmajor uncommon noun 1. rhomboid muscle that draws the scapula toward the spinal column Synonymsrhomboideus major musclegreater rhomboid musclemusculus rhomboideus major Related words Broader terms rhomboid WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.