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Webster 1913 Edition

Noun.

The act or process of indenting or furnishing with teeth.

(Masonry)

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.

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 ‎(plural toothings)

The act or process of indenting or furnishing with teeth.
(construction) Bricks alternately projecting at the end of a wall, in order to be bonded into a continuation of it when the remainder is carried up.