What is the Latin word for dross?

The usual Latin words for “dross” are scōria, rōbīgō, ferrūgō; also aerūgō, faex, pūrgāmentum. The right choice depends on the sense; see the distinctions below.

English → Latin

“dross” in Latin

scōriaslag, dross, scoria rōbīgōrust (on metals); mildew; rust (on plants)ferrūgōrust (or the colour), specifically iron-rust or its colour aerūgōrust of copper, verdigris; canker of the mind, ill will, envy, avarice faexsediment, dregs; salt of tartar; brine used for pickling pūrgāmentumsweepings, offscourings, filth, dirt

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

dross

The recrement of metal, scoria.

Rust, rubigo (general term, rubigo corripit ferrum): ferrugo (of iron) :aerugo (of copper, verdigris; of which one kind was called “scolecia”).

Refuse, faex: purgamentum. Vid: REFUSE.

Quick answer

What is the Latin word for dross?: The usual Latin words for “dross” are scōria, rōbīgō, ferrūgō; also aerūgō, faex, pūrgāmentum. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.