pianist vs. piano player

[James di Properzio]

In musical organology, "fiddle" refers to the whole class of bowed
chordophones (see the New Grove, or the Newer Grove...), whether in art
or folk music.  It also specifically refers to forms of Medieval
European bowed instruments earlier than the Renaissance violin: the
fidel (ME and MF), MF videl, vielle, etc., going back at least to the
11th c.  Violin (violino), in form and name, doesn't precede cinquecento
Italy.

The current terms fiddle and violin both describe the same instrument
(the bridge is not attached and not a permanent part of the instrument):
that which was perfected in the Renaissance as the violin.  But their
range is not co-extensive; fiddle covers instruments other than the
violin.

-James di Properzio