Petiolule is a term used in botany to refer to the small stalk that attaches a leaflet to a larger leaf or stem. Although the term is commonly used in the scientific community, it is not widely known outside of this field. There are several synonyms for petiolule, however, that may be more easily recognized by the general public. These include leaflet stem, secondary petiole, and leaflet pedicel. Understanding these common synonyms for petiolule can help individuals better understand botanical terminology and the structure of various plants.