am·​mo·​coe·​tes | \ ˌaməˈsētēz \
variants: or less commonly ammocoete \ ˈaməˌsēt \
plural ammocoetes\ ˌaməˈsētēz , ˈaməˌsēts \

Definition of ammocoetes

: the larva of any of various lampreys

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!

Other Words from ammocoetes

ammocoetid \ ¦amə¦sētə̇d \ noun or adjective
ammocoetoid \ -​¦seˌtȯid \ adjective

First Known Use of ammocoetes

1856, in the meaning defined above

History and Etymology for ammocoetes

New Latin Ammocoetes, former genus consisting of the ammocoetes, from amm- + -coetes (from Greek koitē bed, from keisthai to lie)

Keep scrolling for more

Learn More about ammocoetes

Time Traveler for ammocoetes

Time Traveler

The first known use of ammocoetes was in 1856

See more words from the same year

Statistics for ammocoetes

Cite this Entry

“Ammocoetes.” Dictionary, Merriam-Webster, Accessed 29 Nov. 2020.

Comments on ammocoetes

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


Test Your Vocabulary

A Thanksgiving Word Quiz

  • a traditional thanksgiving dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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

Love words? Need even more definitions?

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