A trout is a speckled river fish with pink flesh. Catch a trout, rainbow trout, trout fishing.
The flesh is pink because of what the fish eats rather than what it is — farmed trout are fed pigment to match. Brown trout are native to Europe and rainbow trout were introduced from North America. They need cold clean oxygenated water, which makes them an indicator of river health.
1nountroutA speckled river fish with pink flesh.
“He caught a trout in the stream and cooked it over the fire.”
trout is a fish.
Old English truht comes from Latin tructa, perhaps from a Greek word meaning a gnawer.
Proto-Indo-European
*terh₁- — to rub, to turn
Ancient Greek
τρώκτης — nibbler
Latin
tructa
Old French
truite
Old English
truht — trout
Middle English
troute
English, today
trout
Built from
From Middle English troute, troughte, trught, trouȝt, trouhte, partly from Old English truht (“trout”), and partly from Old French truite; both from Latin tructa, perhaps from Ancient Greek τρώκτης (“nibbler”), from τρώγω (“to gnaw”), from Proto-Indo-European terh₁- (“to rub, to turn”). The Internet verb sense originated on BBSes of the 1980s, probably from Monty Python's The Fish-Slapping Dance (1972), though that sketch involved a halibut.
Etymology from Wiktionary, CC BY-SA