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Any of numerous small colorful tropical freshwater fishes chiefly of the family Characidae, such as the neon tetra, often kept in home aquariums.
[Short for New Latin Tetragōnopterīnī, group name : Late Latin tetragōnum, tetragon; see tetragon + Greek pteron, wing.]
n, pl -ra or -ras
(Animals) any of various brightly coloured tropical freshwater fishes of the genus Hemigrammus and related genera: family Characidae (characins)
[C20: short for New Latin tetragonopterus (former genus name), from tetragon + -o- + -pterous, from Greek pteron wing]
n., pl. -ras.
any of several small, brightly colored characin fishes, of tropical American waters.
a combining form meaning “four”: tetralogy.Also, esp. before a vowel,tetr-.
[< Greek, comb. form of téttares four]