The Collaborative International Dictionary of English v.0.48:

Snowflake \Snow"flake`\, n.
   1. A flake, or small filmy mass, of snow.
      [1913 Webster]

   2. (Zool.) See Snowbird, 1.
      [1913 Webster]

   3. (Bot.) A name given to several bulbous plants of the genus
      Leucoium (Leucoium vernum, Leucoium aestivum, etc.)
      resembling the snowdrop, but having all the perianth
      leaves of equal size.
      [1913 Webster]