WordReference Random House Unabridged Dictionary of American English © 2026
pet•i•o•lule
(pet′ē əl yo̅o̅l′, -ə lo̅o̅l′, pet′ē ol′yo̅o̅l),USA pronunciation n. [Bot.]
pet•i•ol•u•lar
(pet′ē ol′yə lər),USA pronunciation pet•i•ol•u•late
(pet′ē ol′yə lāt′, -lit),USA pronunciation adj.
- Botanya small petiole, as of a leaflet in a compound leaf.
- Neo-Latin petiolulus. See petiole, -ule
- 1825–35;