snowflake

Short definition from Wiktionary

Noun

1. 1
   A crystal of snow, having approximate hexagonal symmetry.
2. 2
   Any of several bulbous European plants, of the genus Leucojum, having white flowers.
3. 3
   The snow bunting, Plectrophenax nivalis.
4. 4
   Someone who believes they are particularly unique and special.
5. 5
   Someone hypersensitive to insult or offense, especially a young person with politically correct sensibilities.
6. 6
   A type of lesion that appears as scattered white-brown spots under high magnification light microscopy.
7. 7
   Something that is unique in every presentation.
8. 8
   A Caucasian person.
9. 9
   Someone (usually white) who was opposed to the abolition of slavery (Missouri, 1860s)

Verb

1. 1
   To fall in the manner of a snowflake.
2. 2
   To arrange (data) into a snowflake schema.