baker's salt

Webster's Dictionary (GCIDE)

1.One whose business it is to bake bread, biscuit, etc. [1913 Webster]

2.A portable oven in which baking is done. [U.S.] [1913 Webster]

A baker's dozen, thirteen.

Baker foot, a distorted foot. [Obs.] --Jer. Taylor.

Baker's itch, a rash on the back of the hand, caused by the irritating properties of yeast.

Baker's salt, the subcarbonate of ammonia, sometimes used instead of soda, in making bread. [1913 Webster]