ˌlükōˈkalˌsīt noun
( -s )
Etymology: obsolete German leucochalcit (now leukochalcit ), from German leuc- + chalc- + -it -ite
: a mineral Cu 2 (AsO 4 )(OH).H 2 O(?) consisting of a basic arsenate of copper crystallizing in the form of white silky needles