chemoautotroph Syllabification: (che·mo·au·to·troph)Pronunciation: /ˌkēmōˈôtəˌtrōf, ˌkemō-/Definition of chemoautotroph noun Biology an organism, typically a bacterium, that derives energy from the oxidation of inorganic compounds. Derivatives chemoautotrophicPronunciation: /-ˌôtəˈtrōfik/ adjective chemoautotrophyPronunciation: /-ˈôtəˌtrōfē/ noun chemoautotroph in other Oxford dictionaries Definition of chemoautotroph in the British & World English dictionary