A large, valved, brass wind instrument with a bass pitch; a tuba or a sousaphone.
An instrument similar to the serpent but shaped like a bassoon, used primarily in military bands in the early 19th century.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.