saxtuba

[ saks-too-buh, -tyoo- ]
/ ˈsæksˌtu bə, -ˌtyu- /

noun

a large bass saxhorn.

Origin of saxtuba

1860–65; Sax (see saxhorn) + tuba
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019