This tool relates English terms to concepts from the
SUMO
ontology by means of mappings to
WordNet synsets.
According to WordNet, the noun "optic_axis" has 2 sense(s).
106010105 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".
106010381 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".