Pinnate's a term used to describe feather-like or multi-divided features arising from both sides of a common axis in plant or animal structures, and comes from the Latin word pinna meaning 'feather', 'wing', or 'fin'. A similar term's 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. Plants Botanically, the term describes an arrangement of disc… (More on Pinnate)