Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
copper-bottomed is an adjective meaning "having a bottom of copper or sheathed with copper". It carries one recorded sense.
having a bottom of copper or sheathed with copper
“copper-bottomed pots”
“a copper-bottomed ship”
Definitions, synonyms and semantic relations for copper-bottomed come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.