What does hypoxic mean?
Hypoxic describes something whose oxygen supply is insufficient for normal function. The term is used in medicine to describe tissues or patients deprived of adequate oxygen, in biology to describe organisms living under low-oxygen conditions, and in environmental science to characterize places such as stagnant lakes or sediments where dissolved oxygen is scarce. Hypoxia need not mean that oxygen is completely absent; it specifically denotes a shortage, a distinction reflected in the contrast with anoxic, which means no oxygen. In conversation, a related phrase such as “oxygen-starved” may be more accessible, but hypoxic is the more precise scientific term. Understanding the word is useful in discussions of high-altitude illness, breathing disorders, aquatic habitats, cellular damage, and industrial or environmental hazards.
adjectiveRelating to or characterized by a lack of sufficient oxygen. In medicine and biology, it describes tissues, organisms, or environments in which oxygen levels are abnormally low or inadequate for normal function.
- Characterized by an inadequate supply of oxygen, especially in a biological, medical, or environmental context.
- Affected by or prone to insufficient oxygen availability.
"The rescue team placed the climber in an oxygen-rich chamber to treat her hypoxic condition."
"Fish in the hypoxic zone had to move toward the deeper, better-oxygenated water."
"Severe hypoxic stress can impair a patient's judgment and physical performance."
Hypoxic means there is not enough oxygen—not none at all.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does hypoxic come from?
Hypoxic derives from hypoxia, which was formed in the 19th century from the Greek combining form hypo-, meaning “under” or “less than,” and a form related to Greek oxis, “oxygen.” The prefix-like elements express deficient oxygen rather than a complete absence of it. The same Greek roots also underlie related terms such as anoxia, meaning absence of oxygen, and hyperoxia, meaning excess oxygen.
Related word forms
How hypoxic is actually used
This is a technical term used chiefly in medicine, biology, ecology, and environmental science. It is more precise than saying simply that something is low in oxygen, because it emphasizes oxygen levels that are insufficient for normal biological function.
Easily confused with hypoxic
Hypoxic means oxygen is present but insufficient, whereas anoxic means oxygen is absent altogether.