The Collaborative International Dictionary
Crumbcloth
Crumbcloth \Crumb"cloth`\ (-kl[o^]th`; 115), n. A cloth to be laid under a dining table to receive falling fragments, and keep the carpet or floor clean. [Written also crumcloth.]
Wiktionary
crumbcloth
n. A cloth laid under a dining table to receive falling fragments and keep the carpet or floor clean.