semiaquaticPronunciation: /ˌsɛmɪəˈkwatɪk/Definition of semiaquatic adjective (of an animal) living partly on land and partly in water:semiaquatic crocodiles (of a plant) growing in very wet or waterlogged ground: a semiaquatic vegetation of watercress and horsetailssemiaquatic in other Oxford dictionaries Definition of semiaquatic in the US English dictionary