Synonyms and Antonyms for helium-group

1. helium group (n.)

the series of inert gases

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2. helium (n.)

a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)

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4. group (v.)

arrange into a group or groups

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7. group (n.)

a set that is closed, associative, has an identity element and every element has an inverse

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