leaf

noun

1.
the main organ of photosynthesis and transpiration in higher plants
leafdom foliage leafage
Derived from:
leaf leaflet leafy
2.
a sheet of any written or printed material (especially in a manuscript or book)
folio
Derived from:
leaf leaflet
3.
hinged or detachable flat section (as of a table or door)
Derived from:
leaflet