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From The Collaborative International Dictionary of English v.0.48:
Omnivorous \Om*niv"o*rous\, a. [L. omnivorus; omnis all + vorate to eat greedily. See Voracious.] 1. All-devouring; eating everything indiscriminately; as, omnivorous vanity; an omnivorous intellect. [1913 Webster +PJC] 2. Specifically: (Zool.), Eating both animal and vegetable food. [1913 Webster] -- Om*niv"o*rous*ness, n. [1913 Webster]