A colorless, odorless, highly poisonous gas, CO, formed by the incomplete combustion of carbon or a carbonaceous material, such as gasoline.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "carbon monoxide" in a sentence
"I applied Haldane’s test, and in my opeenion there was between forty and fifty per cent of carbon monoxide in the bluid."
"The stink of carbon monoxide and rain in the air and the sound of Edith Keeler's voice."