DICT.TW Dictionary Taiwan

 Slab n.
 1. A thin piece of anything, especially of marble or other stone, having plane surfaces.
 2. An outside piece taken from a log or timber in sawing it into boards, planks, etc.
 3. Zool. The wryneck. [Prov. Eng.]
 4. Naut. The slack part of a sail.
 Slab line Naut., a line or small rope by which seamen haul up the foot of the mainsail or foresail.