bichromatic

== English == === Etymology === From bi- +‎ chromatic. === Adjective === bichromatic (not comparable) Of two colors. (mathematics) Describing a graph with edges of two possible colours. (physics) Describing a spectrometer (or similar instrument or system) capable of analysing two wavelengths at the same time. (music) Employing or relating to a quarter tone scale. 1998, Robert F. Gellerman, Gellerman's International Reed Organ Atlas (page 233) In 1926 Straube built a Bichromatic Quartertone Harmonium for Mordecai Sandberg with white keys for the whole tones, black keys for the half tones and brown keys for the quarter tones. ==== Derived terms ==== === See also === polychromatic