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A tenor clarinet, pitched in F, having a wider bell and greater range than a standard clarinet.
[Partial translation of German Bassetthorn : Bassett, type of low-pitched string instrument (ultimately from Italian basso, low; see basso) + Horn, horn (from the resemblance of early crescent-shaped models to hunting horns).]
(Instruments) an obsolete woodwind instrument of the clarinet family
[C19: probably from German Bassetthorn, from Italian bassetto, diminutive of basso + horn]