microgroove

American  

[mahy-kruh-groov] / ˈmaɪ krəˌgruv /

noun

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

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microgroove British  

/ ˈmaɪkrəʊˌɡruːv /

noun

1. 1. the narrow groove in a long-playing gramophone record

   2. ( as modifier )

      a microgroove record

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Etymology

Origin of microgroove

First recorded in 1945–50; micro- + groove

Example Sentences

Columbia Records had introduced the long-playing microgroove disc in 1948, a breakthrough that changed the very meaning of “record.”

From The Wall Street Journal

Those shapes are constructed from soft 304 stainless steel and feature a milled microgroove face pattern designed to promote a more efficient roll and a softer feel.

From Golf Digest

It was only with the development of microgroove technology after World War II that a new generation of cutting head came into use.

From Los Angeles Times

The heavy, folded kraft paper used to protect 78 r.p.m. records left marks on the vinyl microgroove when 33 1/3 r.p.m.

From New York Times

But the children's market still offers more than a few moments of genuine magic on microgroove.

From Time Magazine Archive