- Having no colour except black, white, or shades of grey: an achromic area of skinMás ejemplos en oraciones
- The lesions consisted of round achromic patches of two to three centimeters in diameter.
- Her face turned an achromic color, as if she had seen a ghost.
- An achromic halo was obvious around the primary melanoma.
mid 18th century: from a-1 + Greek khrōma 'colour'.