pinnule Meaning, Definition & Usage

  1. noun division of a usually pinnately divided leaf
    pinna.

WordNet

Pin"nule noun
Etymology
L. pinnula, dim. of pinna feather: cf. F. pinnule.
Definitions
  1. (Bot.) One of the small divisions of a decompound frond or leaf. See Illust. of Bipinnate leaf, under Bipinnate.
  2. (Zoöl.) Any one of a series of small, slender organs, or parts, when arranged in rows so as to have a plumelike appearance; as, a pinnule of a gorgonia; the pinnules of a crinoid.

Webster 1913