ˌiməˈrēˌnīt noun
( -s )
Etymology: French imerinite, from Imerina, province of Madagascar, its locality + French -ite
: a monoclinic amphibole Na 2 (Mg,Fe) 6 Si 8 O 22 (O,OH) 2 that is related to richterite and occurs in colorless to blue acicular crystals : a basic silicate of sodium, iron, and magnesium