/fahr mak"euh luyt', fahr"meuh keuh-/ , n.
hydrous calcium arsenate, 2CaO·As 2 O 5 ·5H 2 O, formed by natural alteration of mineral deposits containing arsenopyrite and arsenical ores of cobalt and silver.
[ 1795-1805; PHARMACO- + -LITE; modeled on G Pharmakolith ]