amphioxus

noun
am·​phi·​ox·​us | \ˌam(p)-fē-ˈäk-səs \
plural amphioxi\-​ˌsī \ or amphioxuses

Definition of amphioxus 

: any of a genus (Branchiostoma) of lancelets broadly : lancelet

First Known Use of amphioxus

1837, in the meaning defined above

History and Etymology for amphioxus

New Latin, from amphi- + Greek oxys sharp

Keep scrolling for more

Learn More about amphioxus

Statistics for amphioxus

Look-up Popularity

Time Traveler for amphioxus

The first known use of amphioxus was in 1837

See more words from the same year

Keep scrolling for more

More Definitions for amphioxus

amphioxus

noun
am·​phi·​ox·​us | \ˌam(p)-fē-ˈäk-səs \
plural -oxi\-​ˌsī, -​ˌsē \ or amphioxuses

Medical Definition of amphioxus 

(Entry 1 of 2)

: a lancelet of the genus Branchiostoma broadly : lancelet

Amphioxus

noun

Medical Definition of Amphioxus (Entry 2 of 2)

taxonomic synonym of branchiostoma

More from Merriam-Webster on amphioxus

Britannica.com: Encyclopedia article about amphioxus

Comments on amphioxus

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

WORD OF THE DAY

the figure or shape of a crescent moon

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Add Diction

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!