from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The mouthlike opening in a sponge, used to expel water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the main opening in a sponge from which water is expelled.
from the GNU version of the Collaborative International Dictionary of English
- n. Same as oscule.
from The Century Dictionary and Cyclopedia
- n. In sponges, a mouth or principal exhalent aperture; one of the orifices by which water is expelled. See cuts under Porifera and Spongilla.
- n. One of the suckers, bothria, or fossettes on the head of a tapeworm, by means of which the animal attaches itself to its host.
- n. A pax: apparently an erroneous abbreviation for osculatorium.
Latin ōsculum, diminutive of ōs, mouth; see ōs- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)