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| tet·ra [ téttrə ] (plural tet·ras or tet·ra) |
noun |
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| Definition: |
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popular aquarium fish: a brightly-colored freshwater fish that lives in tropical regions and is kept as an aquarium fish. Family Characidae.
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| [Mid-20th century. Shortening of modern Latin Tetragonopterus< late Latin tetragonum (see tetragon) + Greek pteron "wing"] |
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