The Collaborative International Dictionary
Omnivorousness
Omnivorous \Om*niv"o*rous\, a. [L. omnivorus; omnis all + vorate to eat greedily. See Voracious.]
All-devouring; eating everything indiscriminately; as, omnivorous vanity; an omnivorous intellect.
Specifically: (Zo["o]l.), Eating both animal and vegetable food. [1913 Webster] -- Om*niv"o*rous*ness, n.
Wiktionary
omnivorousness
n. The state of being omnivorous