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osculum

American  
[os-kyuh-luhm] / ˈɒs kjə ləm /

noun

  • oscula
    plural
  1. a small mouthlike aperture, as of a sponge.


osculum British  
/ ˈɒskjʊləm /

noun

  1. zoology a mouthlike aperture, esp the opening in a sponge out of which water passes

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of osculum

1605–15; < New Latin, Latin ōsculum, equivalent to ōs mouth + -culum -cule 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Oocytes arise by the differentiation of amoebocytes and are retained within the spongocoel, whereas spermatozoa result from the differentiation of choanocytes and are ejected via the osculum.

From Textbooks Jan. 1, 2015

Early larval development occurs within the sponge, and free-swimming larvae are then released via the osculum.

From Textbooks Jan. 1, 2015

Their food is trapped when water passes through the ostia and out through the osculum.

From Textbooks Jan. 1, 2015

Early larval development occurs within the sponge, and free-swimming larvae are then released through the osculum.

From Textbooks Apr. 25, 2013

They are never more than about a quarter of an inch in diameter and never possess more than one osculum.

From Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale

Those “little mouths” are called ostia, and the openings where water flows out are oscula.

From New York Times Aug. 10, 2022

The form of the oscula is characteristic in many cases.

From Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale

Thence it passes into other canals, which communicate with what remains of the central cavity, and so out of the oscula.

From Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale

The oscula are small; some of them are raised above the general surface but not on regular turret-shaped eminences.

From Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale

Their surface was flat or undulated gently, except round the oscula where it was raised into sharply conical eminences with furrowed sides.

From Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale

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