helium

باللغة العربية: هِيلِيُوم، هِلْيُوم

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)
2. A form or sample of the element. (countable)

الجمع heliums