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Related to tubaist: tubist
1. A large, valved, brass instrument with a bass pitch.
2. A reed stop in an organ, having eight-foot pitch.
[Italian, from Latin, trumpet; akin to tubus, tube.]
tu′ba·ist, tu′bist n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a musician who plays the tuba
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014