Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

tetra

play
noun tet·ra \ˈte-trə\

Definition of tetra

  1. :  any of numerous small often brightly colored South American characin fishes often bred in tropical aquariums



Origin of tetra

by shortening from New Latin Tetragonopterus, former genus name, from Late Latin tetragonum quadrangle + Greek pteron wing — more at tetragonal, feather


First Known Use: 1931

Other Fishes Terms


tetra-

combining form tet·ra

Definition of tetra-

  1. 1 :  four :  having four :  having four parts <tetravalent>

  2. 2 :  containing four atoms or groups (of a specified kind) <tetrachloride>



Variants of tetra-

or tetr-

Origin of tetra-

New Latin, from Greek; akin to Greek tettares four — more at four


Learn More about tetra


Seen and Heard

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

WORD OF THE DAY

to eat gluttonously or ravenously

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1926873504

Which of the following best describes an easily irritated person?

superficial gregarious flashy tetchy
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ