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The Collaborative International Dictionary
Sarco-

Sarco- \Sar"co-\ A combining form from Gr. sa`rx, sa`rkos, flesh; as, sarcophagous, flesh-eating; sarcology.

Douglas Harper's Etymology Dictionary
sarco-

before vowels sarc-, word-forming element meaning "flesh, fleshy, of the flesh," from Latinized form of Greek sark-, comb. form of sarx "flesh" (see sarcasm).

Wiktionary
sarco-

pre. flesh