noun
electric clock
A clock that runs on electricity, as opposed to a mechanical or battery-powered clock. Common in older contexts; modern usage often prefers 電波時計 (radio-controlled clock) or simply 時計 when the type is clear.
この古い電気時計はまだ動いている。
This old electric clock is still running.
Compound of 電気 (electricity) and 時計 (clock). A straightforward modern coinage.