a small mouthlike aperture, as of a sponge.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use osculum in a sentence
Typically, water comes in through numerous ostia and leaves through the osculum, a hole near the sponges’ top.Sea sponges launch slow-motion snot rockets to clean their pores | Jude Coleman | August 10, 2022 | Science News
The relative times of appearance of the single osculum and smaller apertures is not constant for the different larv.The Works of Francis Maitland Balfour, Volume 1 | Francis Maitland Balfour
Guttur prophanum quod hodie Christo extendis ad osculum, crastino es illud extensurus ad laqueum.The Works of Sir Thomas Browne (Volume 1 of 3) | Thomas Browne
A mock sermon often concludes the night's proceedings, the ordinary salutation of the osculum in tergo being first given.The Superstitions of Witchcraft | Howard Williams
The relative times of appearance of the single osculum and the smaller apertures are not constant for the different larv.The Works of Francis Maitland Balfour, Volume II (of 4) | Francis Maitland Balfour
osculum three times as broad as the central chamber, surrounded by a coronet of short teeth.
British Dictionary definitions for osculum
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