Definition of melilite
: an often honey-yellow mineral (Ca,Na2)(Mg,Fe,Al)(Si,Al)2O7 occurring in small tetragonal crystals that is a silicate of sodium, calcium, aluminum, and iron; especially : a member of the series consisting of an isomorphous solid-solution series between gehlenite and akermanite
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Origin and Etymology of melilite
French mélilite, from méli- meli- + -lite
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