A glass cutter is a tool used to cut glass. It is also known as an ETCHER, which is a 6-letter word that can be used to solve a crossword puzzle. Glass cutters are typically made of steel and have a sharp wheel at the end that is used to score the glass. The scoring creates a line in the glass that can then be broken along the line. Glass cutters are used for a variety of purposes, such as creating stained glass windows or cutting glass for mirrors.