pamphlet

Unbound printed publication with a paper cover or no cover. Among the first printed materials, pamphlets were widely used in England, France, and Germany from the early 16th century, often for religious or political propaganda; they sometimes rose to the level of literature or philosophical discourse. In North America, pre-Revolutionary War agitation stimulated extensive pamphleteering; foremost among the writers of political pamphlets was Thomas Paine. By the 20th century, the pamphlet was more often used for information than for controversy.

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A leaflet in botany is a part of a compound leaf. A leaflet may resemble an entire 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.

A tomato plant has leaflets on compound leaves.

Leaflets borne on the central vein of a leaf are referred to as pinnae; the compound leaves themselves are described as pinnate. A plant may be further subdivided in that the pinnae are themselves split into leaflets, or pinnules; these leaves are now twice pinnate, or bipinnate. A few plant species even have tripinnate leaves.