topaz UK /ˈtəʊˌpæz/US /ˈtoʊˌpæz/noun 7adjective 1forms 1 noun7 •A silicate mineral of aluminium and fluorine, usually tinted by impurities. •An often clear, yellowish-brown gemstone cut from this. •A yellowish-brown color, like that of the gemstone. •Either of two species of very large hummingbirds in the genus Topaza. •A ruby-topaz hummingbird, Chrysolampis mosquitus, the male of which has bright ruby feathers on the head and topaz on the throat •Or (gold or yellow), in blazoning by precious stones.The Field is Ruby, on a Bend Topaz, three Martlets Diamond. […] 4. Pearl, on a Bend Diamond, nine Annulets conjoined in three Links Topaz. — 1726 •(UK, India) A black Catholic soldier in the British Army. adjective1 •Of a yellowish-brown color, like that of the gemstone. formstopazes
