Tile or trim unit that is formed when clay mixtures are forced through a die of suitable configuration, resulting in a continuous ribbon of formed clay. A wire cutter or similar cut-off device is then used to cut the ribbon into appropriate lengths and widths of tile. Found on http://sitescorcher.com/spoorstone/glossary.html
extrude, extruding, extruded 1. To form or to shape by forcing through an opening. 2. To force or to squeeze something out. 3. To thrust out; to force or to press out; to expel: 'The volcanic action extruded molten rock.' 4. To make something by forcing a semisoft material; such as, plastic or molten metal, through a specially shaped mold or nozz... Found on http://www.wordinfo.info/words/index/info/view_unit/2193/