The property or tendency of something to exhibit color changes in response to external stimuli like light, heat, or chemical conditions.
From Greek 'chroma' (color), 'tropos' (turning), and '-ism' (a process or condition). Describes the actual process of color-changing behavior.
Thermochromic materials—like mood rings that change color with body heat—are perfect examples of chromotropism, and they're now used in everything from packaging to safety labels!
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