Examples from the Web for cullet
It is then mixed with the glass mixture and broken glass (“cullet”), and replaced in the crucibles.
This broken glass is called "cullet," and is carefully swept into piles and kept in bins for use in the furnaces.How To Write Special Feature Articles|Willard Grosvenor Bleyer
Bohemian table or plate glass is made with 63 parts of quartz; 26 of purified potashes; 11 of sifted slaked lime, and some cullet.A Dictionary of Arts, Manufactures and Mines|Andrew Ure
They can be traced by cullet heaps and broken-down furnaces, and by their names, often mutilated, recorded in parish registers.