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noun
A stinging-cell structure, composed of a layer of mainly nematocytes surrounding a core of dinoflagellates, amoebocytes and mesoglea, expelled within mucus by Rhizostomeae jellyfish to sting (and in some cases kill) prey in the surrounding water.
Definition source: English Wiktionary via Wiktextract
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Synonyms: none provided
Antonyms: none provided
History
From Cassio(pea) (a genus of jellyfish) + -some, referring to a genus containing some of the jellyfish found to produce them. Coined 2020 by Cheryl L. Ames, et al., in a paper published in Communications Biology (see quotations below).
