Jellyfish comes from English jelly and English fish, with jelly from French gelée, from Latin gēlāta, the feminine past participle of gēlāre meaning to freeze.
jellyfish (English): An almost transparent aquatic animal; any one of...
Definitions
An almost transparent aquatic animal; any one of...
Ancestry of “jellyfish”, step by step
jellyfish traces back through two separate lines of ancestry.