bionomicsPronunciation: /ˌbʌɪə(ʊ)ˈnɒmɪks/Definition of bionomics noun [treated as singular] the study of the mode of life of organisms in their natural habitat and their adaptations to their surroundings; ecology. Derivatives bionomic adjective Origin: late 19th century: from bio- 'life', on the pattern of economicsbionomics in other Oxford dictionaries Definition of bionomics in the US English dictionary