microgroove
[
mahy
-kr
uh
-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.
Origin
1945-50;
micro-
+
groove
British Dictionary definitions for
microgroove
microgroove
/
ˈmaɪkrəʊˌɡruːv
/
noun
1.
the narrow groove in a long-playing gramophone record
(
as modifier
):
a microgroove record