The d-dimensional Hausdorff content of a set is a measure of the size of that set in the dᵗʰ dimension.

It all became so routine, so anodyne, so dull.

powderless ammunition

1870, Owain Myvyr (Owen Jones), Iolo Morganwg (Edward Williams), Idrison (William Owen Pughe) (editors), The Myvyrian Archaiology of Wales, volumes 1-3 (Denbigh)