Dioön

noun

Di·​oön

dīˈōˌän

: a genus of plants (family Cycadaceae) having a somewhat conical trunk crowned by a large tuft of pinnate leaves with spine-tipped pinnae

Word History

Etymology

New Latin, from di- + -oön (from Greek ōion egg)

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!