-phyl·lum \ˈfiləm\noun combining form Etymology: New Latin, from Greek phyllon leaf 1.: one having (such) leaves or leaflike parts — in generic names of animals < Cyathophyllum > and especially plants < Brachyphyllum > < Podophyllum > 2.plural-phyl·la\-lə\: leaf < mesophyllum > 3.: fossil resembling a plant of a (specified) group — in generic names < Sapindophyllum >