(automotive) Mechanical transmission which shifts gears by the action of the driver's hand on the gearstick or gear lever, rather than automatically; a manual gearbox.

(automotive) A multi-speed vehicle transmission, where gear changes require the driver to manually select the gears by operating a gear stick and clutch (which is usually a foot pedal for cars, or a hand lever for motorcycles).

(mathematical analysis) The mathematical function of an electromagnetic wave is a measure of the change undergone by the amplitude of the wave as it propagates in a given direction, which is also called the propagation constant.

plural of transmission function

Used only in the terms cryo-transmission electron micrograph, cryo-transmission electron microscope and cryo-transmission electron microscopy

plural of transmission line

plural of transmission tower

(automotive) Any of several forms of automatic transmission, without specific gears, in which the gear ratio may be changed without any noticeable steps.

(medicine, neurology) Any fatal, incurable degenerative disease of the brain transmitted by prions.

(computing, Internet) A networking protocol, almost always layered on top of the Internet Protocol, that provides reliable, connection based communications.