The Collaborative International Dictionary
Phyllophagous
Phyllophagous \Phyl*loph"a*gous\, a. (Zo["o]l.) Substituting on leaves; leaf-eating.
Douglas Harper's Etymology Dictionary
phyllophagous
"leaf-eating," 1819, from phyllo- + -phagous.
Wiktionary
phyllophagous
a. (context zoology English) Subsisting on leaf; leaf-eating.