helium
The second-lightest chemical element (symbol He), with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas.
Other meanings
A form or sample of the element.
Synonyms
- packaging gas
A kind of
- noble gas
Related words
- antihelium
- antiprotonic helium
- dihelium
- heliair
- helide
- helikite
- helion
- helionium
- heliox
- helium balloon
- helium burning
- helium dating
Word history
From Ancient Greek "ἥλιος" (sun).
Where this comes from
This definition is adapted from “helium” on Wiktionary, by its contributors; related-word lists use Open English WordNet (CC BY 4.0, based on Princeton WordNet), published under CC BY-SA 4.0. This page is published under the same licence.