OXFORD 9000
📚 noun • entry_id 4958

helium

/ˈhiː.li.əm/
Meanings (ES + gloss)
helio
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.
It was an enormous balloon filled with helium, that elemental gas forged from hydrogen in the nuclear furnace of the stars.
Word forms