carbon monoxide

NOUN

colorless odorless toxic gas

Synonyms

WEAK

carbon monoxide gas co exhaust fumes

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He defended crafts chain Michael’s against claims that toxic levels of carbon monoxide at one of its stores caused brain damage to an employee’s unborn daughter.

From The Wall Street Journal • Apr. 7, 2026

A rom-com need not be a sparkling shelf covered with bon-bons, but it shouldn’t be a nauseating cloud of carbon monoxide that makes you want to flee.

From The Wall Street Journal • Apr. 2, 2026

This toxic smoke can include carbon monoxide and hydrogen cyanide.

From BBC • Mar. 16, 2026

The force said their deaths were "thought to be connected to carbon monoxide poisoning".

From BBC • Feb. 20, 2026

There are small traces of nitrogen, water vapor, argon, carbon monoxide and other gases, but the only hydrocarbons or carbohydrates present are there in less than 0.1 parts per million.

From "Cosmos" by Carl Sagan