| a cyclone that forms on a front and, in maturing, produces an increasingly sharp, wavelike deformation of the front |
| a warning of high-wind conditions at sea that are expected to last for up to two hours, and generally result of thunderstorms or squall lines |
The lowest-pitched of the brass instruments. In orchestras, the tuba is usually held across the player's lap. In marching bands, the sousaphone is generally used as a low brass instrument because it was designed to be carried.