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