What does deoxygenized mean?
"Deoxygenized" is the past tense and past participle of the verb "deoxygenize," meaning to remove oxygen from a substance — most often dissolved oxygen removed from water or another liquid. The term belongs chiefly to technical registers: chemical engineering, laboratory science, brewing, and medicine. Engineers deoxygenize boiler feedwater to prevent corrosion; chemists deoxygenize solvents before running reactions that are sensitive to air; physiologists describe blood as deoxygenized once it has given up its oxygen to the body's tissues. In everyday modern English, the rival form "deoxygenated" (from "deoxygenate") is far more frequent, and many writers treat the two verbs as interchangeable. Both derive from "oxygen," itself built on Greek roots meaning "acid-producing." Though rare outside specialist contexts, the word precisely conveys deliberate, complete removal of oxygen rather than mere reduction.
verbPast tense and past participle of "deoxygenize": to remove oxygen from something, especially a liquid such as water or blood.
- To have removed dissolved or free oxygen from a substance, especially water or another liquid.
"The chemist deoxygenized the sample before introducing the reactive catalyst."
"The boiler feedwater was deoxygenized to prevent corrosion of the pipes."
"Once the solution had been deoxygenized, the air-sensitive reaction could proceed safely."
Before astronauts drink their recycled water in orbit, it has to be thoroughly deoxygenized first — otherwise the plumbing would corrode and bacteria would thrive.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does deoxygenized come from?
The word combines the prefix "de-" (from Latin, indicating removal or reversal) with "oxygen" and the verb-forming suffix "-ize" (ultimately from Greek "-izein"). "Oxygen" was coined in French by Antoine Lavoisier in the late 18th century from Greek roots "oxys" (sharp, acid) and "-genes" (producing), reflecting his belief that the element was essential to acid formation. The verb "deoxygenize" arose in 19th-century scientific English alongside its sibling form "deoxygenate."
Related word forms
How deoxygenized is actually used
This is a technical term used mainly in chemistry, engineering, and medicine. In modern usage, "deoxygenated" (the adjective/past participle of "deoxygenate") is considerably more common than "deoxygenized," though both forms appear in scientific writing.
Easily confused with deoxygenized
"Deoxygenized" refers specifically to removing molecular oxygen (O₂), while "deoxidized" more broadly means removing oxygen that is chemically bonded within a compound, as in metallurgy.