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
helium
1 ENTRIES FOUND:
helium
(noun)
helium
/
ˈ
hiːlijəm/
noun
helium
/
ˈ
hiːlijəm/
noun
Britannica Dictionary definition of HELIUM
[
noncount
]
:
a chemical element that is a colorless gas, that is lighter than air, and that is often used to fill balloons
ASK THE EDITOR
Is
slow
an adjective and
slowly
an adverb?
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
magnificent
:
very beautiful or impressive
Learn More »
