| ̷ ̷ ̷ ̷ ̷ ̷ at pharmaco- + noun
Etymology: German pharmakosiderit, from pharmako- pharmaco- + siderit siderite
: a mineral Fe 3 (AsO 4 ) 2 (OH) 3 .5H 2 O consisting of a hydrous basic iron arsenate commonly occurring in green or yellowish green cubic crystals (hardness 2.5, specific gravity 2.9-3)