toothing

CIDE DICTIONARY

toothing, n.

The act or process of indenting or furnishing with teeth. [1913 Webster]
Bricks alternately projecting at the end of a wall, in order that they may be bonded into a continuation of it when the remainder is carried up. [1913 Webster]

Toothing plane, a plane of which the iron is formed into a series of small teeth, for the purpose of roughening surfaces, as of veneers.

toothing, n. projecting bricks or stones left at the end of a wall to allow its continuation.