Heisenberg uncertainty principle

Etymology
Named for Werner Heisenberg, its discoverer, translated into English from a variety of original German terms. Heisenberg originally called the concept Ungenauigkeit (inexactness) or Unbestimmtheit (undeterminedness), whereas his mentor and collaborator Niels Bohr often used Unsicherheit (unsureness). Today in German the most commonly used term for the principle is Unschärfe (blurredness or fuzziness).

Proper noun

 * 1)  The principle that there is an absolute limit on the combined accuracy of certain pairs of simultaneous, related measurements, especially that of the position and momentum of a particle. Originally posited as a problem of measurement, it was soon refined as an inherent property of the universe.

Translations

 * Chinese:
 * Mandarin: 海森堡不確定性原理
 * Finnish: Heisenbergin epätarkkuusperiaate
 * French: principe d'incertitude d'Heisenberg
 * German: Heisenbergsche Unschärferelation,
 * Greek: αρχή της απροσδιοριστίας του Χάιζενμπεργκ
 * Hungarian: Heisenberg-féle határozatlansági elv
 * Italian: principio di indeterminazione di Heisenberg
 * Japanese: ハイゼンベルグの不確定性原理
 * Korean: ^하이젠베르크 불확실성 원리
 * Romanian: principiul incertitudinii al lui Heisenberg
 * Russian: при́нцип неопределённости Гейзенбе́рга
 * Spanish: principio de indeterminación de Heisenberg