Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. Snow on which red-pigmented algae has grown, commonly found in Arctic and Alpine regions.
Wiktionary
GNU Webster's 1913
- adj. snow colored by a mocroscopic unicellular alga (Protococcus nivalis) which produces large patches of scarlet on the snows of arctic or mountainous regions.
- n. See under Red.
Examples
“To M. Vogt fell the microscopic study of the red snow and the organic life contained in it; to M. Nicolet, the flora of the glaciers and the surrounding rocks; to M. Desor, the glacial phenomena proper, including those of the moraines.”
Lists
These user-created lists contain the word ‘red snow’.
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Words for ice and snow
Environmental Ice and Snow
(excluding all the food ice)ice, icicle, frazil, frasil, sleet, slush, snow, flurry, snowfall, freeze, flash-freeze, quick-freeze and 618 more...
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Weather: Those Aren't Cats and Dogs!
Unusual weather and environmental phenomena.
parhelion, sun dog, weathergaw, ball lightning, green sun, ice bomb, slithering rocks, monster raindrops, megacryometeor, raining frogs, raining fish, dust devil and 108 more...
Tweets
Looking for tweets for red snow.

reesetee Also known as watermelon snow, an effect that occurs as a result of reddish-colored snow algae. Here's an example. Sep 24, 2007