leaflet

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. One of the segments of a compound leaf.
2. n. A small leaf or leaflike part.
3. n. A printed, usually folded handbill or flier intended for free distribution.
4. v. To hand out leaflets.
5. v. To hand out leaflets to or in: leafleted the morning commuters; leaflet a neighborhood.

Century Dictionary and Cyclopedia

1. n. A little leaf; in botany, one of the divisions of a compound leaf; a foliole.
2. n. A small leaf of printed matter for distribution; a tract.
3. n. In printing, a circular of six or more small pages on one piece of paper, not stitched or sewed.
4. n. In zoology:
5. n. A plate or layer of branchial appendages of a crustacean.
6. n. One of the three divisions of the human diaphragm.
7. n. One of the thin plates or leaves contained in the lung-books of certain spiders.
8. n. One of the leaf-like branchiæ of certain aquatic insectlarvæ.

Wiktionary

1. n. botany One of the components of a compound leaf.
2. n. botany A small plant leaf.
3. n. A small sheet of paper containing information, used for dissemination of said information, often an advertisement.
4. n. anatomy A flap of a valve of a heart or blood vessel.
5. v. transitive To distribute leaflets to.
6. v. intransitive To distribute leaflets.

GNU Webster's 1913

1. n. A little leaf.
2. n. (Bot.) One of the divisions of a compound leaf; a foliole.
3. n. (Zoöl.) A leaflike organ or part.
4. n. A printed sheet of paper, of one page, or one sheet folded over, containing an advertisement, tract, or other notice, and usually distributed for free or included in the package with a purchased item.

WordNet 3.0

1. n. a small book usually having a paper cover
2. n. part of a compound leaf
3. n. a thin triangular flap of a heart valve