photoapparatusEtymologyFrom photo- + apparatus, a calque of Czech and Slovak fotoaparát, German Photoapparat, Russian фотоаппара́т (fotoapparát), etc.nounSynonym of photo camera.“The glass industry uses oxides of rare-earth metals to finish glass; they are used to produce special types of colorless and stained glass (for example, for optical photoapparatus). Color television is a prospective new field for the use of europium and yttrium compounds.”