Definition of osculum in English:

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osculum

Pronunciation: /ˈɒskjʊləm/

noun (plural oscula /ˈɒskjʊlə/)

Zoology
A large aperture in a sponge through which water is expelled.
Example sentences
  • Sponges will react by closing ostia or oscula, either because of direct physical stimulation or when suspended particles within the sponge are too large or highly concentrated.
  • In budding, aggregates of cells differentiate into small sponges that are released superficially or expelled through the oscula.
  • The hole closes and it is not until some days later that the sponge forms an osculum at its apical pole.

Origin

Early 17th century: from Latin 'little mouth'.

For editors and proofreaders

Line breaks: os¦cu|lum

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