Where does “graminivorus” come from?

graminivorus (Latin) comes from Latin gramen, from Proto-Indo-European gʰreh₁- — to grow.

Ancestry of “graminivorus”, step by step

Step	Language	Word	Meaning
1	Latin	gramen	Grass, turf; A herb, plant
2	Proto-Indo-European	gʰreh₁-	to grow

graminivorus — Etymology, Origin & Word History | Etymology Explorer