petiole
From ZooTerms (Dictionary of Invertebrate Zoology)
petiole (noun; Latin petiolus, little foot): 1. A stock or stem.
2. (Arthropoda: Insecta) a. In Hymenoptera Apocrita, the narrow constricted zone at the base of the gaster. b. In Formicidae, a one or two segmented pedicel.
