1 orthonon | Definition of orthonon

orthonon

noun
or·​tho·​non | \ ˈȯ(r)thəˌnän, -nÉ™n\
plural -s

Definition of orthonon

: a photographic material sensitive only to violet and blue — compare color-blind sense 4

History and Etymology for orthonon

orth- + nonhalation

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