helium

名词 n.
中文释义
发音 hē'lē-əm

英文释义

名词 n.
  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 form or sample of the element. countable

词形变化

heliums plural

词汇关系

近义词
E939 when used as a packaging gas
衍生词
antihelium antiprotonic helium dihelium heliair helide helikite helion helionium heliox helium-3 helium-4 helium balloon helium burning helium dating helium descrambler helium flash helium fusion helium hydride helium I heliumide helium II heliumless heliumlike helium speech helium star helium unscrambler helium variable helonium hydridohelium hyperhelium liquid helium nonhelium orthohelium parahelium radiohelium
相关词
helio- Helios

词源

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.
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