A single organism or microorganism that lives or can function in the absence of oxygen; an anaerobe.
Formed from Greek 'an-' (without) + 'aero' (air) + Latin '-ium' (a noun suffix). This Latinized form was common in scientific nomenclature, treating the organism as a singular entity with its own name.
The singular form 'anaerobium' was more commonly used in older scientific texts; modern scientists prefer 'anaerobe' because it's shorter and easier to pluralize—language even changes in specialized fields.
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