■ plural noun [treated as sing. ] the branch of technology concerned with the production of electric current at the junction of two substances.
↘[treated as plural ] devices having such a junction.
■ plural noun [treated as sing. ] the branch of technology concerned with the production of electric current at the junction of two substances.
↘[treated as plural ] devices having such a junction.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004