colombina

Etymology 1
From.

Noun

 * : young or small dove
 * 1)  a young woman who fakes naivety and ingenuousness
 * 2) a dove-shaped skyrocket that runs along a rope setting off fireworks during the celebrations of Easter Sunday in Florence
 * 3) a dove-shaped sort of sweet Easter focaccia bread,  with a hard-boiled egg in the middle
 * 4) a semolina-based preparation used as an appetizer

Etymology 2
Noun use of the feminine form of the adjective.

Noun

 * 1)  pigeon dung (used as fertilizer)
 * 2)  blue limestone