Definition of sphaeridium
: one of the small organs found on or buried in the test of all recent sea urchins except the Cidaroida suggesting statoliths in structure and possibly subserving a similar function
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of sphaeridium
New Latin, from sphaer- + -idium
Seen and Heard
What made you want to look up sphaeridium? Please tell us where you read or heard it (including the quote, if possible).