Longman Dictionary of Contemporary English homepage

Topic: CHEMISTRY

Date: 1800-1900
Language: Greek
Origin: helios 'sun'; because it was discovered in the sun's spectrum

helium

 noun
     
he‧li‧um [uncountable]
HC a gas that is lighter than air and is used to make balloons float. It is a chemical element: symbol He
Definition of helium from the Longman Dictionary of Contemporary English within
the topic CHEMISTRY
Word of the Day
The CHEMISTRY
Word of the Day is:
saturate

Other related topics