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rainbow fish

rainbow fish

1 3.7
A small bright freshwater fish often kept in aquariums
  • noun
  • /ˈreɪnboʊ fɪʃ/
translation icon : pez arcoíris
  • The aquarium was filled with different species of rainbow fish that dazzled the visitors.

Examples

  • Hey, an Australian rainbow fish.

  • She added several rainbow fish to her tank, and their colors brightened the room.

  • In the clear waters of the lagoon, you could see a school of rainbow fish swimming gracefully.

Synonyms

guppy
vsrainbow fish
7 2.5

A small bright freshwater fish often kept in a home aquarium

describes the fish by appearance and native region rather than naming it
Lebistes reticulatus
vsrainbow fish
  • Archaic
8.9

A small freshwater fish from South America and the West Indies often kept in aquariums

is the common descriptive phrase emphasizing color and origin rather than the scientific name

Surface Forms

rainbow fish singular
rainbow fish plural

Morphology

rainbow + fish

The meaning (a brightly colored fish) is directly and transparently derived from combining 'rainbow' (multi-coloured) with 'fish' (aquatic animal); the phrase simply describes a fish with rainbow-like colours. This adjective+noun compositional pattern is common cross-linguistically, so a B1 learner who knows both constituents would readily infer this sense.

Etymology

Rainbow fish gets its name from the fish's bright, shiny colors; the scales and stripes look like a small rainbow on a fish. That's why rainbow fish means 'a small, brightly colored freshwater fish' often kept in aquariums.