oxygen
C1Neutral to Formal; scientific/technical in primary sense; metaphorical in general use.
Definition
Meaning
A colourless, odourless, gaseous chemical element (symbol O, atomic number 8) essential for respiration and combustion, constituting about 21% of the Earth's atmosphere.
A metaphorical source of vitality, energy, or life-sustaining support; also refers to the oxygen element in specific chemical compounds or contexts (e.g., oxygen mask, oxygen tank).
Linguistics
Semantic Notes
Primarily a non-count mass noun when referring to the gaseous element or supply. Can be used countably in chemistry to refer to atoms or molecules ('two oxygens'). Metaphorical use is common but less formal.
Dialectal Variation
British vs American Usage
Differences
Minimal lexical differences; minor spelling variations in derived forms (e.g., oxidise/oxidize). Pronunciation differs (see IPA).
Connotations
Identical scientific and metaphorical connotations in both varieties.
Frequency
Comparably high frequency in scientific, medical, and general contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
N + of + oxygen (a molecule of oxygen)oxygen + for + NP (oxygen for the patient)V + oxygen (absorb oxygen)oxygen + V (oxygen diffuses)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “a breath of fresh oxygen (rare variant of 'fresh air')”
- “to give someone oxygen (metaphor: to revive or energise)”
Usage
Context Usage
Business
Rare, except in specific industries (e.g., medical gas supply, aerospace: 'The company's core product is medical-grade oxygen.')
Academic
Very frequent in chemistry, biology, medicine, environmental science: 'The study measured oxygen uptake in marine organisms.'
Everyday
Common in health, sport, and general knowledge contexts: 'She needed oxygen after the marathon.'
Technical
Essential in scientific, engineering, and medical documentation with precise terminology: 'The patient's arterial oxygen partial pressure was low.'
Examples
By Part of Speech
verb
British English
- The system is designed to oxygenate the blood.
- The lake had become oxygenated.
American English
- They had to oxygenate the water in the fish tank.
- The process oxygenates the fuel.
adverb
British English
- Not applicable; no standard adverbial form.
American English
- Not applicable; no standard adverbial form.
adjective
British English
- The oxygenic properties were studied.
- She used an oxygen mask.
American English
- The oxygenic mixture was prepared.
- He checked the oxygen tank.
Examples
By CEFR Level
- We need oxygen to live.
- Fish get oxygen from water.
- The fire went out because it used all the oxygen.
- Mountaineers often carry oxygen tanks.
- The patient's oxygen levels were monitored continuously.
- Photosynthesis produces oxygen as a by-product.
- Hypoxia refers to a deficiency in the amount of oxygen reaching the tissues.
- The catalyst facilitates the reduction of molecular oxygen.
Learning
Memory Aids
Mnemonic
Think: 'OX Y GEN' - an OX (strong animal) needs good GENes to process oxygen efficiently.
Conceptual Metaphor
OXYGEN IS LIFE / OXYGEN IS ENERGY / OXYGEN IS SUPPORT (e.g., 'This project is the oxygen our department needs.')
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'кислород' which maps directly; the trap is using 'oxygen' as a countable noun too freely in non-chemical contexts. Avoid calquing 'кислородный' directly as 'oxygenic' outside of chemistry; use 'oxygen-rich' or 'oxygenated' instead.
Common Mistakes
- Using 'an oxygen' incorrectly (except in chemistry: 'an oxygen atom'). Confusing 'oxygen' with 'air'. Misspelling as 'oxigen' or 'oxygene'.
Practice
Quiz
In which of these contexts is 'oxygen' used metaphorically?
FAQ
Frequently Asked Questions
Primarily uncountable when referring to the gas ('The room lacked oxygen'). It can be countable in chemistry referring to atoms or molecules ('Two oxygens are bonded to that carbon').
Air is the mixture of gases in Earth's atmosphere (mostly nitrogen and oxygen). Oxygen is a specific chemical element, one component of air, essential for respiration.
Not directly. The related verb is 'oxygenate' (to supply, treat, or mix with oxygen). 'Oxygen' itself remains a noun.
The main difference is in the first vowel: British English uses the /ɒ/ sound (as in 'lot'), while American English uses the /ɑː/ sound (as in 'father'), reflecting a systematic accent difference for this vowel class.