Cycadeoidea

noun
Cy·​cad·​e·​oi·​dea

Definition of Cycadeoidea

: 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

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!

History and Etymology for Cycadeoidea

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

Keep scrolling for more

Learn More about Cycadeoidea

Statistics for Cycadeoidea

Cite this Entry

“Cycadeoidea.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/Cycadeoidea. Accessed 11 December 2019.

Comments on Cycadeoidea

What made you want to look up Cycadeoidea? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

heavy with or as if with moisture

Get Word of the Day daily email!

Test Your Vocabulary

Semantic Drift Quiz

  • a twisty river
  • Which of the following was once a synonym for fun?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!