for 1c. | 1. | Music.
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| 2. | Meteorology. funnel cloud. |
| a rapidly rotating funnel-shaped cloud extending downward from the base of a cumulonimbus cloud, which, if it touches the surface of the earth, is a tornado or waterspout. |
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.
TUBA networking, protocol
An Internet protocol, described in RFC 1347, RFC 1526 and RFC 1561, and based on the OSI Connectionless Network Protocol (CNLP).
TUBA is one of the proposals for Internet Protocol Version 6.
(1995-04-03)