Definition of petiole in US English:



  • 1The stalk that joins a leaf to a stem; leafstalk.

    • ‘For experiments, Cuscuta shoots of 30-35 cm length were cut from the stock culture and carefully twisted around the stems or petioles of older source leaves.’
    • ‘The high pressure flow meter was first used to measure the hydraulic conductance of whole shoots and its components, i.e. stems, petioles, and leaf blades in Quercus, Acer, and Populus species.’
    • ‘The experimental plants were partitioned into roots, petioles, leaves and stolons.’
    • ‘Plastid morphogenesis in stalk cells of the two types of trichome from both the stem and leaf petiole is highly variable, and a variety of different plastid morphologies can be observed in the same stalk cell.’
    • ‘Plants were dissected into leaves, stems with petioles, and inflorescences.’
    stem, shoot, trunk, stock, cane, bine, bent, haulm, straw, reed
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    1. 1.1Zoology A slender stalk between two structures, especially that between the abdomen and thorax of a wasp or ant.
      • ‘Ants have one or two bumps at their thin waists called petioles.’
      • ‘Paper wasps are longer, thinner, and more smooth and shiny than honey bees and have longer, narrower waists (called petioles) than do bees.’
      • ‘Combs are attached to a substrate directly or by a petiole, and in larger nests combs can be a unit of construction themselves in forming stacked comb nests.’


Mid 18th century: from French pétiole, from Latin petiolus ‘little foot, stalk’.