Alpenglow

Al'pen·glow` noun A reddish glow seen near sunset or sunrise on the summits of mountains; specif., a reillumination sometimes observed after the summits have passed into shadow, supposed to be due to a curving downward (refraction) of the light rays from the west resulting from the cooling of the air.
Found on http://www.encyclo.co.uk/webster/A/62

Alpenglow

• (n.) A reddish glow seen near sunset or sunrise on the summits of mountains; specif., a reillumination sometimes observed after the summits have passed into shadow, supposed to be due to a curving downward (refraction) of the light rays from the west resulting from the cooling of the air.
Found on http://thinkexist.com/dictionary/meaning/alpenglow/

alpenglow

reddish glow appearing at sunrise or sunset in mountains
Found on http://phrontistery.info/a.html
No exact match found