microgroove

[ mahy-kruh-groov ]

noun

1. a needle groove so narrow that over 200 can be cut in an inch of playing surface on a long-playing record.

microgroove

/ ˈmaɪkrəʊˌɡruːv /

noun

1. 1. the narrow groove in a long-playing gramophone record
   2. ( as modifier )

      a microgroove record

Word History and Origins

Origin of microgroove¹

First recorded in 1945–50; micro- + groove