from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Material with embedded wire teeth used for cleaning files; card-clothing
- n. A tool for removing debris from between the teeth of a file.
from The Century Dictionary and Cyclopedia
- n. A piece of card-clothing used for cleansing files from metallic dust.
file (“cutting and smoothing tool”) + card (“material with embedded wire bristles”) (Wiktionary)