crystal detector

English Thesaurus

1. a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier (noun.artifact)

hypernym	:	detector,
definition	:	electronic equipment that detects the presence of radio signals or radioactivity (noun.artifact)

part holonym	:	crystal,
definition	:	a crystalline element used as a component in various electronic devices (noun.artifact)