snowflake

noun
A flake of snow, especially a feathery ice crystal, typically displaying delicate sixfold symmetry. (He watched the tiny snowflakes drift onto his black jean pants.)
An overly sensitive or easily offended person, or one who believes they are entitled to special treatment on account of their supposedly unique characteristics.
A white-flowered Eurasian plant related to and resembling the snowdrop, typically blooming in the summer or autumn. (The summer snowflake also belongs to this group of taller plants.)