Webster’s Revised Unabridged Dictionary · 1913
Dichromic
Di·chro′mic (dī·krō′mĭk), a. [Gr. δίχρωμος two-colored; δι- = δίς- twice + χρῶμα color.] Furnishing or giving two colors; — said of defective vision, in which all the compound colors are resolvable into two elements instead of three. Sir J. Herschel.