ammonoid

noun
am·​mo·​noid | \ˈa-mə-ˌnȯid \

Definition of ammonoid 

: ammonite Mesozoic ammonoids

First Known Use of ammonoid

1866, in the meaning defined above

Keep scrolling for more

Learn More about ammonoid

Statistics for ammonoid

Look-up Popularity

Time Traveler for ammonoid

The first known use of ammonoid was in 1866

See more words from the same year

More from Merriam-Webster on ammonoid

Britannica.com: Encyclopedia article about ammonoid

Comments on ammonoid

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

WORD OF THE DAY

a private place of worship

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Syn City

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!