Synonyms for Leaf (same or very similar meaning)
WordNet sense 1 (the main organ of photosynthesis and transpiration in higher plants):
foliage, leafage
WordNet sense 2 (a sheet of any written or printed material (especially in a manuscript or book)):
folio
WordNet sense 3 (look through a book or other written material):
flick, flip, riff, riffle, thumb
From the ODE community, based on WordNet
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