Pinnate

From Freepedia

Pinnate is a term used to describe feather-like or many-divided features arising from both sides of a common axis in plant or animal structures, and comes from the Latin word pinna for "feather". A similar term is pectinate, which refers to a comb-like arrangement of parts (arising from one side of an axis). The term contrasts somewhat with palmate, in which the parts or structures radiate out from a common point.

Botanically, the term describes an arrangement of structures (such as leaflets, veins, lobes, branches, or appendages) on opposite sides of a common axis. For example, once-divided leaf blades having leaflets arranged on both sides of a rachis are pinnately compound leaves. Many palms (notably the feather palms) and most cycads and grevilleas have pinnately divided leaves. Most species of ferns have pinnate fronds. Pinnate plants are colloquially called "feather-leaved".

paripinnate –

imparipinnate –

bipinnate –

tripinnate –

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The fish, Platax pinnatus, is known as the pinnate spadefish or pinnate batfish.