選せん択たく子し

noun

selector; selective device

Technical term used in engineering, computing, and electronics for a component or circuit that selects among multiple inputs or signals.

• この回かい路ろでは、選せん択たく子しが入にゅう力りょく信しん号ごうを切きり替かえる。

  In this circuit, the selector switches the input signals.