The Collaborative International Dictionary of English v.0.48:

Viameter \Vi*am"e*ter\, n. [L. via a way + -meter.]
   An odometer; -- called also viatometer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Viatometer \Vi`a*tom"e*ter\, n.
   A viameter.
   [1913 Webster]