pinnate

adjective

(L. pinnatus: feathered, winged) Feather shaped, i.e., with main stem (usually called a rachis) and a series of branches (usually called pinnules) along each side. Said of a compound leaf (somewhat vaguely resembling a feather) having leaflets arranged on either side of the stem, usually in pairs opposite each other. The feather vein pattern of simple leaves. Cf. bipinnate, tripinnate.