Tangent scale

Also found in: Medical.
(Gun.) a kind of breech sight for a cannon.

See also: Tangent

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Mounted in the same plane as the target was a tangent scale with thin vertical black lines separated by 0.5 cm, below numbers that subtended 5 arcmin.