Anoxia

an abnormally low amount of in the body tissues; hypoxia.
the mental and physical disturbances that occur as a result of hypoxia.
Historical Examples

Hypoxia or anoxia or lack of oxygen could affect his memory.
Warren Commission (6 of 26): Hearings Vol. VI (of 15) The President’s Commission on the Assassination of President Kennedy

Employing our feeble energies in turns, we dig a trench in the sand where I hope to find the anoxia.
More Hunting Wasps J. Henri Fabre

There they encountered the larvae of the Cetonia, the Oryctes, the anoxia, succulent morsels on which to rear their families.
More Hunting Wasps J. Henri Fabre

I told myself: When I can’t read the numbers any more I’ll know my vision is blurring from the beginning of anoxia.
Last Resort Stephen Bartholomew

What must have happened is that the suit ran out of oxygen, and I lost consciousness due to anoxia.
Accidental Death Peter Baily

There was no cerebral response, that is the pupils remained dilated and fixed; there was evidence of anoxia.
Warren Commission (3 of 26): Hearings Vol. III (of 15) The President’s Commission on the Assassination of President Kennedy

noun
lack or absence of oxygen
a deficiency of oxygen in tissues and organs Compare hypoxia

anoxia an·ox·i·a (ān-ŏk’sē-ə, ə-nŏk’-)
n.
The absence or reduced supply of oxygen in inspired gases, arterial blood, or tissues.
an·ox’ic adj.