(dated) A small portable radio receiver having transistors rather than thermionic valves; popular from the late 1950s.

(physics) A transistor in which the emitter and collector barriers are formed by p-n junctions between semiconductor regions of opposite conductivity type.

(electronics) A transistor used as a switch to pass logic levels between nodes of a circuit, instead of as a switch connected directly to a supply voltage.

plural of transistor radio

(context, electronics) belonging to the time (late 1960s) after individual transistors were replaced by integrated circuits

plural of thin-film transistor

A form of transistor manufactured by depositing layers of semiconductor, dielectric and metal on a substrate