From Longman Dictionary of Contemporary Englishomni-omni- /ɒmnɪ $ ɑːm-/ prefix [in nouns and adjectives] ALL/EVERYTHINGEVERYWHEREeverything or everywhere → all an omnivore (=an animal that eats all kinds of food)
Examples from the Corpus
omni-• an omniscient narrator• Goats are omnivores.Origin omni- Latin omnis “all” 