American Heritage Dictionary
(3)
Century Dictionary
(5)
GNU Webster's 1913
(1)
WordNet
(2)
Elsewhere on the web
The duo behind Cina are the same two behind the snowflake-patterned flash drives that have been circulating around the internet this week, but in this case we're more captivated by the reinvention of ...— Cool Hunting
And it would be even better if you tried not to whip it out and give a senior and well-respected member of our department a golden shower from the lofty heights of your vast experience as a snowflake, as someone did this weekend.— blueollie
So, whoosh, we overtook the BMW and discreetly, legally, we settled in front of him like an insolent snowflake - and what did he observe about the machine that had so elegantly shown him up?— AGORAVOX - The Citizen Media

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You can expect to see this word several times a year.