Definition: The word "anerobic" refers to organisms that are unable to utilize oxygen, typically in an anaerobic environment (such as deep-sea or desiccated soil). It describes living organisms that don't require oxygen for their metabolic processes. Anerobically living organisms can survive without air by utilizing compounds like lactic acid, which is produced by fermentation. The term comes from the Greek words "an" and "erebo," meaning to ferment (to digest) or "to anerobic." It's important to note that anaerobic cells are often found in environments with low oxygen levels due to their inability to utilize oxygen. They may use other methods like bacteria, fungi, or even dead organic matter for their energy needs.