He kupu hei whakaahua i ngā rauropi kāore e ora i te hāora, hei whakaahua hoki i ngā tukanga koiora kāore e tutuki mā te hāora. Hei tauira, ko ngā momo moroiti pērā i ētahi huakita me te īhi. Ehara mā te hāora e wewete te pūngao o roto i ā rātou kai hei oranga mō ēnei momo rauropi, mā te tukanga hāora-kore kē.
A word used to describe an organism or a biological process which does not require oxygen. Micro-organisms, such as bacteria and yeasts, are examples of anaerobic organisms. These organisms do not require oxygen to release the energy in their food, this is achieved through an anaerobic process.