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
Synonyms:
- atomic number 2
- he
Other Word Forms of Helium
Noun
Singular:
helium
Plural:
heliumsOrigin 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
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