hēlijs

From New Latin helium, from Ancient Greek ἥλιος (hḗlios, “sun”) (because its presence was first theorised in the sun's atmosphere).

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hēlijs m (1st declension)

1. helium (chemical element, noble gas)

   ar hēliju pildīts gāzu termometrs ― a gas thermometer filled with helium

   pazemināt temperatūru ar hēlija palīdzību ― to lower the temperature with the help of helium