collodionPronunciation: /kəˈləʊdɪən/Definition of collodion noun [mass noun] a syrupy solution of nitrocellulose in a mixture of alcohol and ether, used for coating things, chiefly in surgery. Origin: mid 19th century: from Greek kollōdēs 'glue-like', from kolla 'glue'collodion in other Oxford dictionaries Definition of collodion in the US English dictionary