a needle groove so narrow that over 200 can be cut in an inch of playing surface on a long-playing record.
Origin of microgroove
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
- the narrow groove in a long-playing gramophone record
- (as modifier)a microgroove record
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012