chalcanthum

== English == === Etymology === Borrowed from French calcante or Latin chalcanthum. === Noun === chalcanthum (uncountable) (alchemy, obsolete) Copper(II) sulfate (CuSO4). Synonyms: calcanthum, chalcanth ==== Derived terms ==== chalcanthite === References === “chalcanthum”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000. == Latin == === Etymology === Borrowed from Ancient Greek χάλκανθον (khálkanthon). === Noun === chalcanthum n (genitive chalcanthī); second declension copperas (paste in water, for blackening leather) ==== Declension ==== Second-declension noun (neuter). ==== Synonyms ==== atramentum sutorium === References === “chalcanthum”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press “chalcanthum”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.