medusidan

medusidan, a. and n. Zool.

(mɪˈdjuːsɪdən)

[f. Medūsid-æ (see prec.) + -an.]

a. adj. Of or belonging to the Medusidæ or jelly-fishes (Cassell's Encycl. Dict. 1885). b. n. One of the Medusidæ (Webster, 1847–54).