The Collaborative International Dictionary of English v.0.48:
copper-bottom \copper-bottom\, copperbottom \copperbottom\v. t. to provide with a copper bottom. Syn: copperbottom. [WordNet 1.5] 2. to bind with a cord, tie with a cord. Syn: cord up. [WordNet 1.5]WordNet (r) 3.0 (2006):
copper-bottom v 1: provide with a copper bottom; "copper-bottom a frying pan"