sphaeridium
sphaeridium · sphaeridia
Synonym of capitulumSynonym of capitulum.
Meaning
2 sensesSynonym of capitulum.
A tiny, spherical appendage, generally formed in masses to form a kind of sense organ, found on the test of most sea urchins. It is generally supposed to be an olfactory organ, or for equilibrium, similar to the otolith
Origin
From Ancient Greek σφαιρίδιον (sphairídion, “sphere (diminutive form)”), by surface analysFrom Ancient Greek σφαιρίδιον (sphairídion, “sphere (diminutive form)”), by surface analysis, sphero- + -idium.
Wiktionary, CC BY-SA 4.0 · source
Forms
plural: sphaeridia| Singular | sphaeridium |
|---|---|
| Plural | sphaeridia |
irregular · Lesson
Synonyms
1 synonymsWord family
1 related wordsDerivedsphaeridial
Lessons for this word
1 lessons- A1Plural nouns — Because its plural is irregular