SEALED-BEAM


Meaning of SEALED-BEAM in English

transcription, транскрипция: [ ˈsēl(d)-ˈbēm ]

adjective

Date: 1939

: being an electric lamp with a prefocused reflector and lens sealed in the lamp vacuum

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.