Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun optic_axis

2 senses of optic axis

Sense 1
optic axis -- (in a doubly refracting crystal, the line in the direction of which no double refraction occurs; "a crystal may have either one or two optic axes")
       => axis -- (a straight line through a body or figure that satisfies certain conditions)

Sense 2
principal axis, optic axis -- (a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted; "in a normal eye the optic axis is the direction in which objects are seen most distinctly")
       => axis -- (a straight line through a body or figure that satisfies certain conditions)