Category: Disambiguation The leaves of a Beech tree A leaf with laminar structure and pinnate venation In botany, a leaf is an above-ground plant organ specialized for photosynthesis. ... The petiole of this ant consists of two segments In entomology, the term petiole is most commonly used to refer to the constricted first (and sometimes second) metasomal segment of members of the Hymenopteran suborder Apocrita; it may be used to refer to other insects with similar body shapes, where... In anatomy, the pedicle (also spelled pedicel) is the segment between the transverse process and the vertebral body. ... Scorpion anatomy: 1 = Prosoma; 2 = Mesosoma; 3 = Metasoma The metasoma is clearly visible on this ant: it is the posterior section, including the petiole The metasoma is the posterior part of the body, or tagma, of arthropods whose body is composed of three parts, the other two being the prosoma... In this image of a female Polistes wasp tending to a nest, a long, black petiole, by which the nest is attached to the branch, is quite apparent. ... Image File history File links Disambig_gray. ...