ˈmīəˌnīt noun
( -s )
Etymology: French méionite, from Greek meiōn less + French -ite
: a mineral Ca 4 Al 6 Si 6 O 24 (SO 4 ,CO 3 ,Cl 2 ) consisting of an aluminosilicate of calcium with other anions (as sulfate, carbonate, and chloride) and being isomorphous with marialite — see scapolite