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]