鱒は英語で
trout

英語の定義

鱒
1. n. trout, sea trout: more specifically, fish belonging to genera of the family Salmonidae: Salmo, Oncorhynchus, Coregonus, or Salvelinus
2. n. Usage: As with many terms that name organisms, this term is often spelled in katakana, especially in biological contexts, as マス

trout
1. n. Any of several species of fish in Salmonidae, closely related to salmon, and distinguished by spawning more than once.
Many anglers consider trout to be the archetypical quarry.
2. n. (UK, pejorative) An elderly woman of dubious sensibilities.
Look, you silly old trout, you can't keep bringing home cats! You can't afford the ones you have!
3. v. (Internet chat) To (figuratively) slap someone with a slimy, stinky, wet trout; to admonish jocularly.