Also found in: Dictionary, Thesaurus, Medical, Idioms, Wikipedia.
1. short for cobblestone
2. Geology a rock fragment, often rounded, with a diameter of 64--256 mm and thus smaller than a boulder but larger than a pebble
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
Stone that is smaller than a boulder but larger than gravel. See also: Stone
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
A rock fragment larger than a pebble and smaller than a boulder, having a diameter in the range of 64-256 millimeters (2.5-10.1 inches), somewhat rounded or otherwise modified by abrasion in the course of transport.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1.A rock fragment between 2 ½ and 10 in. (64 and 256 mm) in diameter, used for rough paving, walls, and foundations.
2. Coarse aggregate for concrete, having a nominal size in the range 3 to 6 in. (75 to 150 mm).
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.