A color change or discoloration; in biology, the loss of natural color.
From Greek 'ana-' (against, back) + 'chromasis' (coloring). Describes reversal or loss of color in organisms.
In nature, anachromasis often signals distress—when animals lose pigmentation due to pollution or stress, it's a visible warning that something's wrong, which is why scientists watch color changes in wildlife as environmental indicators.
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