/grah twahr"/ ; Fr. /grddann twannrdd"/ , n. , pl. grattoirs /-twahrz"/ ; Fr. /-twannrdd"/ . Archaeol.
a flaked stone implement, usually Upper Paleolithic, retouched at the end and used probably for working wood or cleaning hides; scraper.
[ 1870-75; gratt ( er ) to GRATE 2 + -oir -ORY 2 ]