-phyllcomb. form
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Primary stress is retained by the usual stressed syllable of the preceding element and vowels may be reduced accordingly; see e.g.
megaphyll n.Origin: A borrowing from Greek. Etymon: Greek ϕύλλον.
Etymology: < ancient Greek ϕύλλον leaf (see phyllo- comb. form). Compare French -phylle (formations in which are found from the early 19th cent., apparently earliest in chlorophylle chlorophyll n.), German -phyll (formations in which are found from at least the second half of the 19th cent.).Formations are found from the early 19th cent., originally following French models. Chiefly combined with first elements ultimately of Greek origin. In sense 1 after chlorophyll n.
This is a new entry (OED Third Edition, March 2006; most recently modified version published online March 2020).