Helium Definition

hēlē-əm
noun
A colorless, odorless chemical element, one of the noble gases, having the lowest known boiling and melting points: it is used in low-temperature work, as a diluent for oxygen, in deep-sea breathing systems, for inflating balloons, etc.: symbol, He; at. no. 2
Webster's New World
(countable) A form or sample of the element.
Wiktionary

(physics) The rare isotope of helium, 32He, that has a single neutron.

Wiktionary

(physics) The normal isotope of helium, 42He, that has two neutrons.

Wiktionary
Synonyms:
atomic number 2he

Other Word Forms of Helium

Noun

Singular:
helium
Plural:
heliums

Origin of Helium

  • From Greek hēlios sun (so called because its existence was deduced from the solar spectrum) sāwel- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From New Latin helium, from Ancient Greek ἥλιος (hēlios, “sun”) (because its presence was first theorised in the sun's atmosphere).

    From Wiktionary

Advertisement

Find Similar Words

Find similar words to helium using the buttons below.

Words Starting With

Words Ending With

Unscrambles

helium