Meaning & use

tetra

noun·Academic

Last updated

a small, often brightly colored freshwater fish popular in home aquariums.

See it in a sentence

He added a school of neon tetras to brighten up the fish tank.

Tetras are known for swimming together in tight schools.

A note on using this word

The word comes from the fish's scientific family name and is also a prefix meaning 'four' in scientific terms like 'tetrahedron,' though as a standalone word it refers to the fish.

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