snowblink

[snoh-blingk] /ˈsnoʊˌblɪŋk/
noun
1.
a white luminosity on the underside of clouds, caused by the reflection of light from a snow surface.
Compare iceblink.
Origin
1860-65; snow + blink
British Dictionary definitions for snowblink

snowblink

/ˈsnəʊˌblɪŋk/
noun
1.
a whitish glare in the sky reflected from snow Compare iceblink