e·lec·tro·chro·mic 
(ĭ-lĕk′trō-krōmĭk)
(ĭ-lĕk′trō-krōmĭk)adj.
Of or relating to a substance that changes color or transparency when subjected to charged electrodes, as in the liquid crystal display of many calculators.
[ELECTRO- + CHROM(O)- + -IC.]