sə̇ˈrülēˌīt noun
( -s )
Etymology: French céruléite, from cérulé cerulean (from Latin caeruleus ) + -ite
: a mineral CuAl 4 (AsO 4 ) 2 (OH) 2 .4H 2 O consisting of a hydrous copper aluminum arsenate occurring in turquoise-blue microcrystalline masses (sp. gr. 2.80)