Moon type

~noun

Entry: a system of large embossed letters used in printing for the blind and especially for those blinded late in life that requires less finger sensitivity than Braille, consists of nine characters derived from Roman capital letters and used in varying pasiorthography, the lines being printed alternately from left to right and right to left.

Etymology: Named after English inventor William Moon (d. 1894).

@ Milton-Kindersley Advanced Dictionary