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Webster 1913 Edition

Adj.

[L.

gramen

graminis

, grass +

vorare

to eat greedily.]

Feeding or subsisting on grass, and the like food; – said of horses, cattle, and other animals.

Adj.

[L. gramen, grass, and voro, to eat.]

Feeding or subsisting on grass. The ox and all the bovine genus of quadrupeds are graminivorous animals; so also the horse or equine genus.

graminivorous ‎(comparative more graminivorous, superlative most graminivorous)

Although the term was formerly more widely used (e.g. of grazing animals), it is now restricted to insects, as most such animals are better termed herbivorous.