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.
• Various other natural structures, such as paper wasp nests, where there is a constricted "stalk".

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