Plural of ctenium; a comb-like anatomical structure or appendage found in various aquatic organisms.
The plural form of 'ctenium' (Greek 'ktenos'), following Latin pluralization patterns. Used in systematic descriptions of organism anatomy.
In taxonomy, the word 'ctenii' appears in scientific descriptions of creatures from sea cucumbers to obscure mollusks—it's one of those terms that makes you realize how many creatures have evolved comb-like structures for filtering or movement!
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