Instrument for measuring horizontal angles.

Spectrum colors dispersed through prism.

Colors separated by a prism.

In archaeology, a prismatic blade is a long, narrow, specialized stone flake tool with a sharp edge, like a small razor blade.

Outer protective layer in mollusks.

Dispersion of light into colors.

(nautical, engineering) The ratio between the total submerged volume of a ship's or boat's hull, on the one hand, and the product of the length of the submerged portion of the hull with the area of the largest cross-sectional slice of the submerged portion of the hull, on the other.

Breakage along parallel crystal planes.