Definition of "petiole" in English

noun

1. (botany) The stalk of a leaf, attaching the blade to the stem.

2. (entomology, insect anatomy) A narrow or constricted segment of the body of an insect; especially, the metasomal segment of certain Hymenoptera, such as wasps.

3. (entomology) The stalk at the base of the nest of the paper wasp.