The plural of anaerobe; multiple organisms that live and reproduce without requiring oxygen.
From ana- (without) + aero (air) + bios (life) + -s (plural). The plural allows microbiologists to discuss multiple oxygen-independent organisms.
Your gut is absolutely full of anaerobes—trillions of them help you digest food and they don't mind at all that there's no oxygen down there! They're so common that scientists actually needed a plural form specifically for them.
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