Sentence:  A <WSD>nick</WSD> is a hollow cast crossways in the shanks of types, to make a distinction readily between differnt sorts and sizes; and to enable the compositor to perceive quickly the bottom of the letter as it lies in the case, when composing; as <WSD>nicks</WSD> are always cast on that side of the shank on which the bottom of the face of the letter is placed. A great deal of inconvenience frequently arises, owing to the founders casting different founts of types with a similar <WSD>nick</WSD> in each. 
Meaning of the word marked with <WSD> tags:  A notch cut crosswise in the shank of a type, to assist a compositor in placing it properly in the stick, and in distribution.