a whitefish, Prosopium williamsoni, inhabiting mountain streams and lakes of the western U.S. and Canada.
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- mountain system,
- mountain time,
- mountain view,
- mountain viscacha,
- mountain wave,
- mountain wind,
Also called Rocky Mountain whitefish.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019