before vowels phyll-, word-forming element meaning "leaf," from Greek phyllo-, combining form of phyllon "leaf," from PIE *bhol-yo- "leaf," suffixed form of root *bhel- (3) "to thrive, bloom."
phyco-
phycology
phylactery
phyletic
Phyllis
phyllo-
phyllo
phyllophagous
phylo-
phylogenesis
phylogeny