Definition of microgroove in English:

microgroove

noun

  • The very narrow groove on a long-playing phonograph record.

    • ‘With Jan Peerce and Leonard Warren, she recorded an excellent Rigoletto for RCA Victor in 1950 - the first operatic recording to be released on microgroove, unless I am mistaken.’

Pronunciation:

microgroove

/ˈmīkrəˌɡro͞ov/