Noah Webster
Slab
SLAB, adjective Thick; viscous. [Not used.]
SLAB, noun
1. A plane or table of stone; as a marble slab
2. An outside piece taken from timber in sawing it into boards, planks, _ c.
3. A puddle. [See Slop.]
SLABS OF TIN, the lesser masses which the workers cast the metal into. These are run into molds of stone.