circulation [circulations](act of moving in a circle) noun [UK: ˌsɜː.kjʊ.ˈleɪʃ.n̩] [US: ˈsɝː.kjə.ˌleʃ.n̩]
(Bokmål) sirkulasjonssystem noun
circulatory system [circulatory systems](parts of an animal body which circulate the blood around the body) noun [UK: ˌsɜː.kjə.ˈleɪ.tə.ri ˈsɪ.stəm] [US: ˈsɝː.kjə.lə.ˌtɔː.ri ˈsɪ.stəm]