The part of a compound leaf that resembles an individual leaf blade, and which is one of several similar structures that are attached to a common petiole; also, leaf-like sub-divisions of a compound leaf; the leaflets together make up the blade of a compound leaf.
In compound leaves such as the ashes, the green blades that attach to the central rachis are termed leaflets (a simple leaf like Redbud, on the other hand, does not have leaflets, but instead has only a single leaf blade attached to a petiole).
A leaflet in botany is a part of a compound leaf. A leaflet may resemble a complete leaf, but it is not borne on a stem as a leaf is, but rather on a vein of the whole leaf. Compound leaves are common in many plant families.