achromous

== English == === Etymology === From a- +‎ Ancient Greek χρῶμα (khrôma, “color”) +‎ -ous. === Adjective === achromous (comparative more achromous, superlative most achromous) colorless; achromatic ==== References ==== William Dwight Whitney, Benjamin Eli Smith, editors (1895–1910), “achromous”, in The Century Dictionary and Cyclopedia: […], New York, N.Y.: The Century Co., →OCLC.