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Principal axis
/prˈɪnsəpəl
ˈæksəs/
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Principal axis
noun
1.
A line that passes through the center of curvature of a lens so that light is neither reflected nor refracted.
Synonym:
optic axis
.
See images of 'Principal axis'
Etymology of 'Principal axis'
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Words linked to "Principal axis" :
optic axis
,
axis
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