On-end; upright; pertaining or relating to the end.
1855, The Repertory of patent inventions:
... modes to the exclusion of either radial arms or any specific curve, my invention not referring to these modes, but to neutralising the endwise pressure on the axis, as more particularly stated hereinafter in my claim of invention.
1914, Engineering news:
But the same slender member in bending and not in endwise compression can stand an extreme fiber stress several ...