helium
The American Illustrated Medical Dictionary · 1913 · p. 12
(he’le-um) (Gr. ἥλιος sun]. A gaseous element that exists in the sun, the air, and in various minerals. Symbol, He; atomic weight, 4.
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Scientific Terms (1927)
The American Dictionary and Cyclopedia (1910)
Chamber's Twientieth Century Dictionary (1908)
A Classical Dictionary (1904)
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