grayling

• ⇰ A European fish (<spn>Thymallus vulgaris</spn>), allied to the trout, but having a very broad dorsal fin; -- called also umber>. It inhabits cold mountain streams, and is valued as a game fish.
• ⇰ An American fish of the genus <gen>Thymallus</gen>, having similar habits to the above; one species (<spn>T. Ontariensis</spn>), inhabits several streams in Michigan; another (<spn>T. montanus</spn>), is found in the Yellowstone region.