'Stipule' definitions:

Definition of 'stipule'

From: WordNet
noun
A small leafy outgrowth at the base of a leaf or its stalk; usually occurring in pairs and soon shed

Definition of 'Stipule'

From: GCIDE
  • Stipule \Stip"ule\, n. [L. stipula a stalk, stem, straw: cf. F. stipule. Cf. Stubble.] (Bot.) An appendage at the base of petioles or leaves, usually somewhat resembling a small leaf in texture and appearance. [1913 Webster]