Fid″dler (?), n. [AS. fiðelere.] 1. One who plays on a fiddle or violin.
2. (Zoöl.) A burrowing crab of the genus Gelasimus, of many species. The male has one claw very much enlarged, and often holds it in a position similar to that in which a musician holds a fiddle, hence the name; — called also calling crab, soldier crab, and fighting crab.
3. (Zoöl.) The common European sandpiper (Tringoides hypoleucus); — so called because it continually oscillates its body.
Fiddler crab. (Zoöl.) See Fiddler, n., 2.