tetra
/ˈtetrə/noun
1- a small tropical freshwater fish that is typically brightly coloured. Native to Africa and America, many tetras are popular in aquaria.方鳍鱼。
1.1
- Numerous genera and species in the family Characidae, including the neon tetra.脂鲤科中众多属, 众多种, 包括霓虹方鳍鱼。
词源
mid 20th cent.: abbreviation of modern Latin Tetragonopterus (former genus name)， literally 'tetragonal finned'.