-phyllycomb. form

Primary stress is retained by the usual stressed syllable of the preceding element and vowels may be reduced accordingly; see e.g.
polyphylly n.Origin: A borrowing from Greek, combined with an English element. Etymons: Greek ϕύλλον , -y suffix3.
Etymology: < ancient Greek ϕύλλον leaf (see phyllo- comb. form) + -y suffix3.Forming nouns chiefly after adjectives in -phyllous comb. form. Combined with first elements ultimately of Greek origin. Attested from the mid to late 19th cent.
This is a new entry (OED Third Edition, March 2006; most recently modified version published online March 2020).