allochromatic

adjective

al·​lo·​chro·​mat·​ic

1

: accidentally rather than inherently pigmented : variable in color

—used of certain minerals that are without pigmentation when pure

2

: having or relating to photoelectric properties due to the presence of an impurity or as a result of irradiation

Word History

Etymology

all- + chromatic

First Known Use

1849, in the meaning defined at sense 1

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now