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Define potassium-argon. potassium-argon synonyms, potassium-argon pronunciation, potassium-argon translation, English dictionary definition of potassium.

Liskov Substitution Principle - Duur: 9:53.

FYI — английская аббревиатура, образованная от слов «for your information» («к вашему сведению»).

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First spotted it in Halliwell’s Dictionary of Archaic and Provincial Words ( 1846 ) , but listed in the OED with attestations dating back to 1590s : )