noun
also bath·y·chrome ˈbathə.ˌkrōm
( -s )
Etymology: German bathychrom, from bathy- + -chrom -chrome
: an atom or group that when introduced into a compound (as a dye) causes a visible deepening of color (as from yellow toward green) — contrasted with hypsochrome
• bath·o·chro·mic | ̷ ̷ ̷ ̷.|krōmik adjective