The Britannica Dictionary
mobile search
Home
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
×
Britannica Homepage
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
The Britannica Dictionary
carbon monoxide
1 ENTRIES FOUND:
carbon monoxide
(noun)
carbon monoxide
/-mə
ˈ
nɑkˌsaɪd/
noun
carbon monoxide
/-mə
ˈ
nɑkˌsaɪd/
noun
Britannica Dictionary definition of CARBON MONOXIDE
[
noncount
]
:
a poisonous gas that is formed when carbon is not completely burned and especially when gasoline is burned in car engines
ASK THE EDITOR
What is the adjective form of
tourist
?
See the answer »
QUIZZES
Vocabulary Quiz
Test your word power
Take the Quiz »
Name That Thing
Take our visual quiz
Test Your Knowledge »
WORD OF THE DAY
plummet
:
to fall or drop suddenly in amount, value, etc.
Learn More »