Pronunciation: (hed'rāl"), [key]
1. a railing on a sailing vessel, extending forward from abaft the bow to the back of the figurehead.
2. Also called headbox. a narrow, boxlike case extending across the top of a window blind and covering the mechanical devices by which the blind operates.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.