Cycadeoidea

noun

Cy·​cad·​e·​oi·​dea

: a genus of extinct gymnospermous plants of the Mesozoic era (family Cycadeoidaceae) having short stout trunks embedded with reproductive cones and covered in spirally arranged leaf bases and topped by a crown of large leaves with many divisions

Word History

Etymology

New Latin, from Cycadeae (subfamily of Cycadaceae) (formerly used as synonym of Cycadaceae) (from Cycad-, Cycas, type genus + -eae) + -oidea

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!