PRINCIPAL AXIS

Pronunciation (US): (GB):

Meaning:

A line that passes through the center of curvature of a lens so that light is neither reflected nor refracted

Example:

in a normal eye the optic axis is the direction in which objects are seen most distinctly

Synonyms:

optic axis; principal axis

Classified under:

Nouns denoting cognitive processes and contents

Hypernyms ("principal axis" is a kind of...):

axis (a straight line through a body or figure that satisfies certain conditions)