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helium

Definition of abbreviation (noun) -

first member of group V111; a noble gas

Part of speech:

Noun
Plural: no plural
Example sentences with this word:

Helium is the second commonest element; hydrogen is the most common.

Hydrogen, helium and methane would not condense to form cloud particles at the pressures and temperatures through the cloud regions and therefore their relative abundances apply throughout the atmosphere.

Appears in following categories:
PCAT,
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