Definition of petiolular in US English:

petiolular

adjective

Botany
rare
  • Of or relating to a petiolule.

Origin

Mid 19th century; earliest use found in Robert Mayne (1808–1868). From petiolule + -ar. Compare French pétiolulaire.

Pronunciation

petiolular

/ˌpɛtɪˈəʊljʊlə/