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Originally defined by the Swedish physicist Manne Siegbahn (1886–1978) in 1925.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Synonym of x unit. Full definition →
Originally defined by the Swedish physicist Manne Siegbahn (1886–1978) in 1925.
Etymology from Wiktionary, CC BY-SA 4.0.