nihikutes, optikariistades jm. kasutatav abiskaala mõõteriista põhiskaala jaotiste murdosade lugemiseks
a small movable auxiliary scale, attached to, and sliding in contact with, a scale of graduation. Usually graduated at 9/10 of the scale on the main scale, it enables readings on the latter to be made to a fraction (usually a tenth) of a division by noting which member of the auxiliary scale is aligned with any line on the main scale.
Supplementary appliances, such as one or more fixed or movable hooks, rings, handles, plates, pins, tongues, winders, or verniers, which facilitate the use of the measure and extend its use, are permissible on condition that they cannot cause confusion.
