Definition of petiolus in US English:

petiolus

noun

Botany Zoology
  • 1Botany. In early use: the stalk of a plant part (leaf, flower, etc.). Later: specifically a leaf stalk; = "petiole". Now rare.

  • 2Zoology= "petiole".

Origin

Early 18th century; earliest use found in Hans Sloane (1660–1753), physician and collector. From classical Latin petiolus, variant (in later MSS and editions) of peciolus little foot, stalk of fruit, probably representing a diminutive formation from ped-, pēs foot; compare -ole. In specific use in sense 1 after scientific Latin petiolus leaf stalk (Linnaeus, 1751 or earlier).

Pronunciation

petiolus

/ˌpɛtɪˈəʊləs/