Pronunciation: (krôs'jak", kros'-; Naut.krô'jik, kroj'ik), [key]
the lowermost square sail set on the mizzenmast of a ship or of a bark with four or more masts; mizzen course. See diag. under ship.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.