Final answer:
Medical oxygen is the air supplied from cylinders, bulk containers, or reconstructed from oxygen USP. It is used in medical practice to provide oxygen enrichment to patients who have inadequate oxygen supply.
Step-by-step explanation:
The air supplied from cylinders, bulk containers, or reconstructed from oxygen USP is defined as medical oxygen. Oxygen is essential for combustion processes and is used by plants and animals in respiration. In medical practice, oxygen-enriched air is administered to patients who are receiving inadequate oxygen supply due to illnesses such as shock or pneumonia.