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 3.0 & Open English WordNet

Helium is a chemical element; it has symbol He and atomic number 2. Wikipedia

Chemical element with symbol He and atomic number 2. Wikipedia Disambiguation

Chemical element with symbol He and atomic number 2; rare gas Wikidata

A colorless, odorless, tasteless, nearly inert noble gas with the symbol He and atomic number 2. It is after hydrogen the second most abundant element in the universe. It is a component of air and is being used for balloon and airship fillings, as well as for deep-sea breathing systems in combination with oxygen. OmegaWiki

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. Wiktionary

Chemical element. Wiktionary (translation)