Coloratura: A soprano or tenor voice of great range, agility and delicacy. Famous coloratura roles include The Magic Flute's Queen of the Night, many bel canto heroes and heroines and various opera lyrique female role (notably by Gounod and Thomas.) This is verbatim from the fourth edition of Rough Guide to Opera. One of my classes at Goucher required the book, which is currently listed at Amazon.com up to nearly a thousand bucks!
I don't include the notoriously difficult Queen's aria though, yet I throw in Figaro from Rossini's Il Barbiere di Sivigliato, just because it's awesome!