A plural or variant form, possibly relating to cyme-like structures or an obsolete zoological term with unclear modern usage.
Etymology uncertain; possibly a Latin plural form from 'cymtium' or a 19th-century coinage in zoology that fell out of standard use. No clear etymological path is documented in major references.
Some words disappear from scientific use as classification systems improve—this might be one of those forgotten technical terms that served briefly when a field was still figuring out how to organize knowledge.
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