A type of freshwater fish, often found in cool rivers and lakes, that is popular for both fishing and eating.
From Old English *truht*, from Late Latin *tructa*, from Greek *trōktēs* “a kind of fish,” related to *trōgein* “to gnaw.” The name may refer to the fish’s nibbling feeding style.
Trout are biological snobs about water quality—they only thrive in clean, oxygen‑rich streams. If you see lots of trout, it’s often a sign the river is healthy long before scientists run tests.
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