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1. the spiral channel, usually V-shaped, in a gramophone record
2. Anatomy any furrow or channel on a bodily structure or part; sulcus
3. Mountaineering a shallow fissure in a rock face or between two rock faces, forming an angle of more than 120?
4. in the groove Jazz playing well and apparently effortlessly, with a good beat, etc.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A continuous recess formed centrally along the edge of a timber board in order to accommodate a tongue.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
Any of a group of depressions in the double helix of deoxyribonucleic acid that are believed to be sites occupied by nuclear proteins.
A long, narrow channel in a surface.
Glaciated marks of large size on rock.
One of the spiral depressions in the rifling of a gun to impart a spinning motion to a projectile which stabilizes it in flight.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A long narrow cut in the edge or face of a wood member; a groove across the grain is a dado; one parallel with the grain is a plow.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.