鉱こう石せき検けん波ぱ器き

noun

crystal detector

An early radio component that uses a mineral crystal to rectify radio signals. Historical term, now mostly of interest in vintage radio contexts.

• 鉱こう石せき検けん波ぱ器きは、初しょ期きのラジオ受じゅ信しん機きに使つかわれて