Cerebral hypoxia refers to the largest parts of the brain, called the cerebral hemispheres. However, the term is often used to refer to a lack of oxygen supply to the entire brain. In cerebral hypoxia, sometimes only the oxygen supply is interrupted. Brain cells are extremely sensitive to a lack of oxygen. Some brain cells start dying less than 5 minutes after their oxygen supply disappears. As a result, brain hypoxia can rapidly cause severe brain damage or death.
Also found in: Dictionary, Thesaurus. Related to irrelevantly: relevant. Unrelated or inapplicable to the matter in issue. Irrelevant evidence has no tendency to prove or disprove any contested fact in a lawsuit. adj. not important, pertinent, or germane to the matter at hand or to any issue before the court.
There are costs which can be changed (avoided) and costs which cannot be avoided. The first type of costs is also called relevant costs and the second type is called irrelevant costs. Examples of relevant costs in the context of a make or buy decision include direct labor, direct materials, variable overhead.