Prismatic-compass
noun
1.
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.
Read Also:
- Prismatic-layer
noun 1. the middle layer of the shell of certain mollusks, consisting chiefly of crystals of calcium carbonate.
- Prismatic-telescope
noun, Surveying. 1. a telescope having an eyepiece at the side or top equipped with a reflecting prism, used for taking sights at steep angles.
- Prismatoid
noun, Geometry. 1. a polyhedron having its vertices lying on two parallel planes. noun 1. a polyhedron whose vertices lie in either one of two parallel planes Compare prism (sense 3), prismoid
- Prism bar
prism bar n. A graduated series of prisms mounted on a frame and used in ocular diagnosis.
- Prism-binocular
noun 1. Usually, prism binoculars. Optics. binocular (def 1).