Share this entry

Share this page

osculum

Line breaks: os¦cu|lum
Pronunciation: /ˈɒskjʊləm
 
/

Definition of osculum in English:

noun (plural oscula /-lə/)

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'.

Definition of osculum in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day emulous
Pronunciation: ˈɛmjʊləs
adjective
seeking to emulate someone or something