Definition of proventriculus in English:


Line breaks: pro|ven¦tricu|lus
Pronunciation: /ˌprəʊvɛnˈtrɪkjʊləs

noun (plural proventriculi)

  • 1The narrow glandular first region of a bird’s stomach between the crop and the gizzard.
    More example sentences
    • The proventriculus and gizzard are small, and the lower esophagus is sacculated, which delays passage of particles into the lower gut where additional fermentation occurs in the paired ceca.
    • Ingesta from the proventriculus and gizzard were preserved in 75% alcohol and examined under a dissecting scope.
    • Parents sustain themselves during incubation on energy stored as body fat and lipid-rich stomach oil in the proventriculus.
  • 1.1The thick-walled muscular expansion of the oesophagus above the stomach of crustaceans and insects.
    More example sentences
    • Enhanced levels of expression are seen in older embryos adjacent to the segmental involutions (C, arrowheads) and in the salivary glands, proventriculus, and somatic musculature.
    • Four tunnels off the lumen of the proventriculus of the carpenter bee, Xylocopa virginica virginica, have been discovered.
    • The proventriculus of the worker honeybee is an organ which effects a highly efficient separation of pollen grains from the medium in which they are suspended.


mid 19th century: from pro-2 'before' + Latin ventriculus 'small belly', diminutive of venter, ventr- 'belly'.

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