argento-|ɑːˈdʒɛntəʊ| comb. form of L. argentum silver; = ‘Having silver as a constituent.’ 1837–68Dana Min. 39 Argentopyrite..a pseudomorph consisting of the minerals argentite, marcasite, pyrrhotite, pyrargyrite.1868Watts Dict.Chem. V. 305 Argento-cuprous Sulphide..Argentiferous Copper-glance.