Before revision: The word sibling was reintroduced in 1903 in an article in Biometrika, as a translation for the German Geschwister, having not been used since 1425.
After revision: Middle English, specificallyThe word sibling was reintroduced in 1903 in an article in Biometrika, as a translation for the German Geschwister, having not been used since 1425.