adj. omnivorous, carnivorous and herbivorous, eating meat and vegetation

nm. omnivore, creature that eats both meat and vegetables, creature that eats all kinds of food

(n.) = omnivore.
Ex: Orangutans are omnivores but are mostly herbivorous.

(adj.) = omnivorous.
Ex: Given this expertise, reference librarians who are dedicated generalists with comprehensive and omnivorous interests and knowledge provide the best reference service.