noun
raised type; embossed lettering
Historical term for raised characters used to assist visually impaired readers; now largely replaced by modern braille and tactile printing methods.
江戸時代には、凸字を使った印刷物が視覚障害者のために作られていた。
In the Edo period, printed materials using raised type were made for visually impaired people.
この博物館には、昔の凸字の本が展示されている。
Old books with embossed lettering are on display at this museum.