anthracometer

== English == === Etymology === From anthraco- +‎ -meter. === Noun === anthracometer (plural anthracometers) (obsolete, rare) An instrument for measuring the amount of carbonic acid in a mixture, usually in air === References === “anthracometer”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.