The story
Introduced in 1918 by mathematician Felix Hausdorff.
Etymology from Wiktionary, CC BY-SA 4.0.
Hausdorff dimension
Today it means: A type of fractal dimension, a real-valued measure of a geometric object that assigns 1 to a line segment, 2 to a square and 3 to a cube. Formally, given a metric space X and a subset of X labeled S, the Hausdorff dimension of S is the infimum of all real-valued d for which the d-dimensional Hausdorff content of S is zero. Full definition →