leaf
Definitions
A flattened, usually green, lateral outgrowth of a plant stem that is the primary organ of photosynthesis and transpiration.
A single sheet of paper, especially one of the pages of a book.
A hinged or detachable part of a table or door that can be extended or folded.
Examples
A single yellow leaf drifted slowly from the tree to the ground.
She carefully turned the leaf of the old book to continue reading.