What does "helium" mean?
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.
Helium
/ˈhiː.li.əm/ noun
noun ·Rare ·Advanced level
Meaning at a glance
- Primary sense: 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.
- Grammar: helium is listed as noun.
- Nearest alternatives: ammonia, atomic number 2, balloon gas, carbon dioxide.
- Useful contrasts: gas helium, heavy gas, reactive gas.
- Usage evidence: It is, moreover, very difficult to explain in any other way why there should be so much helium in the universe.
How to use "helium"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "helium" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "helium" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "helium" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "helium" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
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- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "helium" is acting as noun in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "ammonia" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
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Final meaning check
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When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 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. uncountable
"It was an enormous balloon filled with helium, that elemental gas forged from hydrogen in the nuclear furnace of the stars."
- 2 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) wordnet
- 3 A form or sample of the element. countable
Synonyms
All synonymsAntonyms
gas heliumheavy gasreactive gas
Example
"It is, moreover, very difficult to explain in any other way why there should be so much helium in the universe."
Common questions
What is a synonym for "helium"?
Common synonyms include: ammonia, atomic number 2, balloon gas, carbon dioxide, coolant, cryogen.
How do you use "helium" in a sentence?
It is, moreover, very difficult to explain in any other way why there should be so much helium in the universe.
How do you pronounce "helium"?
Pronounced /ˈhiː.li.əm/.
Etymology
From New Latin helium, from Ancient Greek ἥλιος (hḗlios, “sun”) (because its presence was first theorised in the Sun's atmosphere) with the suffix + -ium. Probably coined by Norman Lockyer. This suffix is unusual, because it is usually used only for metallic elements. It is likely that Lockyer, being an astronomer, was unaware of the usual chemical conventions.