An organism that feeds chiefly on plants; an animal that feeds on herbage or vegetation as the main part of its diet.

Feeding chiefly on plants.

plural of herbivore

The state or quality of being herbivorous.

in a herbivorous manner

herbivorousness

(biology) Relating to herbivores or to herbivory

(of plants) eaten by herbivores

The condition of being herbivorized

(neologism) A man, especially a Japanese man, who eschews romantic relationships.