The Collaborative International Dictionary of English v.0.48:
dustmop \dust"mop\ (d[u^]st"m[o^]p), n. a dry mop for dusting floors. Syn: dust mop, dry mop. [WordNet 1.5]WordNet (r) 3.0 (2006):
dustmop n 1: a dry swab for dusting floors [syn: dustmop, dust mop, dry mop]