noun which may take the genitive case particle 'no'
herbivorous; graminivorous
Describes an animal that feeds on plants; used attributively with の. 'Graminivorous' is a more specific term for grass-eating, but 'herbivorous' is the common equivalent.
牛は草食性の動物です。
Cows are herbivorous animals.
草食性の恐竜は植物だけを食べていた。
Herbivorous dinosaurs ate only plants.
Means 'omnivorous', eating both plants and animals.
Compound of 草食 (herbivory) + 性 (nature, -ity). The exact historical derivation is uncertain, but the components are transparent.