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a colorless, odorless, poisonous gas, CO, that burns with a pale-blue flame, produced when carbon burns with insufficient air: used chiefly in organic synthesis, metallurgy, and in the preparation of metal carbonyls, as nickel carbonyl.
Contemporary Examples

For example, research has shown that most carbon-monoxide alarm incidents are triggered by a malfunctioning furnace.
How to Hack the Perfect Home Daniel Gross November 14, 2013

His team of engineers set to work on a new device, a combination smoke and carbon-monoxide detector.
How to Hack the Perfect Home Daniel Gross November 14, 2013

Historical Examples

The gases which ascend from the fire consist largely of “carbon-monoxide,” a burnable gas with lots of heat still left in it.
The Romance of War Inventions Thomas W. Corbin

Take as an illustration, the part played by water in determining the explosion of oxygen and carbon-monoxide gas.
On Digestive Proteolysis R. H. Chittenden

Producer-gas, pro-dū′sėr-gas, n. a mixture of hydrogen and carbon-monoxide diluted with nitrogen.
Chambers’s Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) Various

a colourless odourless poisonous flammable gas formed when carbon compounds burn in insufficient air and produced by the action of steam on hot carbon: used as a reducing agent in metallurgy and as a fuel. Formula: CO

1869, so called because it consists of one carbon and one oxygen atom (as opposed to carbon dioxide, which has two of the latter). An older name for it was carbonic oxide gas.

carbon monoxide n.
A colorless, odorless, highly poisonous gas that is formed by the incomplete combustion of carbon or of a carbonaceous material, such as gasoline.
carbon monoxide
A colorless, odorless gas formed when a compound containing carbon burns incompletely because there is not enough oxygen. It is present in the exhaust gases of automobile engines and is very poisonous. Chemical formula: CO.
carbon monoxide (CO)

A compound made up of molecules containing one carbon atom and one oxygen atom.

Note: Carbon monoxide is usually formed when materials burn; it is found, for example, in automobile exhaust.

Note: Carbon monoxide is a colorless, odorless gas that can be fatal to human beings if inhaled.


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