Definition of optic axis
English to English noun - 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.
source: WordNet 3.0 - 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.
source: WordNet 3.0
Visual Synonyms 
Nearby Word
optic axis, optics, optical, optician, optic, ophidious, optiko, optez, obtuse, offtake, oboe da caccia, obduce, off the hook
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