probably borrowed from German Achromat, short for achromatische Linse "achromatic lens"
1900, in the meaning defined above
achroite
achromat
Achromatiaceae
“Achromat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/achromat. Accessed 23 Dec. 2024.
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