ˌsīəˈnä.trəˌkīt noun
( -s )
Etymology: German zyanotrichit, from zyan- cyan- + Greek trich-, thrix hair + German -it -ite — more at trichina
: a mineral Cu 4 Al 2 (SO 4 )(OH) 12 .2H 2 O occurring as a hydrous basic copper aluminum sulfate in bright blue fibrous forms