chlor ‧ o ‧ form /ˈklɒrəfɔːm, ˈklɔː- $ ˈklɔːrəfɔːrm/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: French ; Origin: chloroforme , from Greek chloro- ( ⇨ ↑ chlorofluorocarbon ) + French formyle 'chemical group that contains formic acid' ]
a liquid that makes you become unconscious if you breathe it
—chloroform verb [transitive]