AskDefine | Define petiole

Dictionary Definition

petiole n : the slender stem that supports the blade of a leaf [syn: leafstalk]

User Contributed Dictionary



From petiolus, little foot, diminuitive form of pes.


  1. The stalk of a leaf, attaching the blade to the stem.
  2. A narrow or constricted segment of the body of an insect. Used especially to refer to the metasomal segment of Hymenoptera such as wasps. Alternate form: pedicel.
  3. The stalk at the base of the nest of the paper wasp.

Extensive Definition

Petiole may refer to:
  • Petiole (botany), the stalk of a leaf, attaching the blade to the stem; petiolate leaves are ones where the tendril connects to the leaf before its apex
  • Petiole (insect) (also called a pedicel), the constricted first (and sometimes second) metasomal segment
  • Petiole (nest) is the supporting stalk of an insect nest such as a paper wasp nest
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