apochromatic

adjective
apo·chro·mat·ic | \ˌa-pə-krō-ˈma-tik \

Definition of apochromatic 

: free from chromatic and spherical aberration an apochromatic lens

First Known Use of apochromatic

1886, in the meaning defined above

History and Etymology for apochromatic

apo- + chromatic entry 1, after achromatic

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The first known use of apochromatic was in 1886

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apochromatic

adjective
apo·chro·mat·ic | \ˌap-ə-krō-ˈmat-ik \

Medical Definition of apochromatic 

: free of chromatic and spherical aberration an apochromatic lens

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