prismatic compass
noun
a hand compass equipped with sights and prisms to permit aiming the instrument at a point and at the same time reading the compass direction of the point.
Origin of prismatic compass
First recorded in 1850–55
Words nearby prismatic compass
prism bar,
prism binocular,
prism diopter,
prism spectrometer,
prismatic,
prismatic compass,
prismatic layer,
prismatic telescope,
prismatoid,
prismoid,
prison