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clarinet, single-reed woodwind instrument used orchestrally and in military and brass bands and possessing a distinguished solo repertory. It is usually made of African blackwood and has a cylindrical bore of about 0.6 inch (1.5 cm) terminating in a flared bell. All-metal instruments are made but are little used professionally. The mouthpiece, usually of ebonite (a hard rubber), has a slotlike opening in one side over which a single reed, made from natural cane, is...