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Use "delts" in a sentence
"He could tell; the ridges that defined the tectonics of his delts were a little less precise, the knobs that represented his abs a little less jagged, the bulge of his veins a little less prominent."
"Heavy shoulders, powerful arms, solid delts and lats."
"Dante contracted his delts and worked his wings, tipping to the left as he glided down toward the yacht."