Braille

1.

(a system of representing letters, etc., by raised dots that blind people can read by touch, the characters used in this system) អក្សរសម្រាប់មនុស្សខ្វាក់

1.

A system of printing or writing for the blind in which the characters are represented by tangible points or dots. It was invented by Louis Braille, a French teacher of the blind.