Diagonal scale

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Related to Diagonal scale: vernier scale
a scale which consists of a set of parallel lines, with other lines crossing them obliquely, so that their intersections furnish smaller subdivisions of the unit of measure than could be conveniently marked on a plain scale.

See also: Diagonal

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
In addition, gill taker counts, lateral-line pores, and diagonal scale rows below the lateral line all confirm the identity of the specimen as S.