Axle

The axle carries the waterwheel. It can also carry the Pit Wheel at its opposite end.

axle

[n] - a shaft on which a wheel rotates
Found on http://www.webdictionary.co.uk/definition.php?query=axle

Axle

An axle is a shaft on which a part rotates. See also: Wheel.
Found on http://www.diracdelta.co.uk/science/source/a/x/axle/source.html

axle

noun a shaft on which a wheel rotates
Found on http://wordnetweb.princeton.edu/perl/webwn?s=axle

Axle

The circular shaft connecting two wheels to form a 'wheelset' (q.v.). The wheels are an interference fit to ensure the gauge is maintained. Wheels are removed by forcing them off after injecting oil under high pressure into the wheel hub through a specially designed aperture drilled in the hub.
Found on http://www.railway-technical.com/newglos.shtml

axle

central fitting for bearings in hubs and bottom brackets; also Achsschenkel [German].
Found on http://bikecult.com/bikecultbook/glossary_english.html
No exact match found