n. A condition in which a tissue or environment is severely or totally deprived of oxygen, severe hypoxia.
the GNU version of the Collaborative International Dictionary of English
n. a physiological state in which insufficient oxygen reaches the tissues of the body, especially when of sufficient severity to cause permanent damage.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. severe hypoxia; absence of oxygen in inspired gases or in arterial blood or in the tissues
Word Usage
"In the next or third group, anoxia is more profound, and CO2 retention with hypercapnea is added."