<span class="searchmatch">gatelite</span> (uncountable) (mineralogy) A monoclinic mineral with formula CaCe3Al2(Al,Mg)(Mg,Fe2+,Al)(Si2O7)(SiO4)3(O,F)(OH,O)2 <span class="searchmatch">gatelite</span> group <span class="searchmatch">gatelite</span> supregroup...