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Definition of Pinnate
1. Adjective. (of a leaf shape) featherlike; having leaflets on each side of a common axis.
Definition of Pinnate
1. a. Consisting of several leaflets, or separate portions, arranged on each side of a common petiole, as the leaves of a rosebush, a hickory, or an ash. See Abruptly pinnate, and Illust., under Abruptly.
Definition of Pinnate
1. resembling a feather [adj]
Medical Definition of Pinnate
1. Divided into pinnae, once-compound. Compare: bipinnate, tripinnate. (09 Oct 1997)