achromatic
(optics) Free from color; transmitting light without color-related distortion. / Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.
(sometimes derogatory) A show-off; a person who is stylish but lacks real skill or substance.
(nonstandard) plural of spacecraft
(rare) to stand or insist too much or too long; overstay / (transitive) to stand too strictly on the demands or conditions of.
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