petiole

noun3

1. •
   The stalk of a leaf, attaching the blade to the stem.

   • Most insects consume tissue from the leaf blade were measured just past the twist on the side away only, leaving the leaf petioles unscathed. — 1978
2. •
   The stalk at the base of the nest of the paper wasp.
3. •
   A narrow or constricted segment of the body of an insect; especially, the metasomal segment of certain Hymenoptera, such as wasps.