英和和英

語源

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.

発音

• enPR: hē'lē-əm, IPA: /ˈhiː.li.əm/
• ハイフネーション: he‧li‧um
• 韻: -iːliəm

名詞

helium (countable and uncountable, plural heliums)

1. (uncountable) 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.

   Hyponyms: helium-4 (the usual isotope on Earth), helium-3 (the much rarer of the two stable isotopes)

   • 1997, Ian McEwan, Enduring Love, Vintage (1998), page 3:

     It was an enormous balloon filled with helium, that elemental gas forged from hydrogen in the nuclear furnace of the stars.

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

同意語

• E939 when used as a packaging gas

派生語

関連する語

• helio-
• Helios

参照

• Helium on the British Royal Society of Chemistry's online periodic table

語源

From Ancient Greek ἥλιος (hḗlios, “sun”) +‎ -ium (chemical element suffix).

発音

• (Classical Latin) IPA: [ˈheː.li.ũː]
• (modern Italianate Ecclesiastical) IPA: [ˈɛː.li.um]

名詞

hēlium n (genitive hēliī); second declension

1. (New Latin, chemistry) helium

語形変化

Second-declension noun (neuter).

派生した語

• → Italian: elio
• → Sicilian: ìliu