"capable of living without oxygen," 1879 (as anaerobian; modern form first attested 1884), from French anaérobie, coined 1863 by French bacteriologist Louis Pasteur (1822-1895), from Greek an- "without" (see an- (1)) + aer "air" (see air (n.1)) + bios "life" (see bio-).
1. Anaerobic respiration occurs only in particularly active tissues such as muscles during severe exercise.
2. The slime layer consists of one aerobic and one anaerobic sublayer.
3. Infection, especially anaerobic infection, is much more apt to occur.
4. This is 19 times the energy obtainable under anaerobic circumstances.
5. The use of sulfates and carbon dioxide requires strictly anaerobic conditions.