Any of numerous small colorful tropical freshwater fish of the family Characidae, such as the neon tetra, found in South America and Africa, and often kept in home aquariums. Also called characin.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "tetra" in a sentence
"His work is spectacular (3 Thieves, the Rose, Treb in tetra paks, etc.)"
"What's strange about the tetra is that, even dead, the fish had beautiful color."
"I find it encouraging to see consumers picking up wine packaged in tetra-pack containers, wine bars pouring from a keg, and more and more creativity to find real value for the consumer."