Isidae

plural noun

Isi·​dae

ˈīsəˌdē,

ˈizə-

: a family of gorgonians having an axis composed of alternating horny and calcareous joints

Word History

Etymology

New Latin, from Isis, type genus (from Greek, originally Egyptian goddess of motherhood and the family) + -idae

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!