scallop
1. any of various marine bivalves of the family Pectinidae, having a fluted fan-shaped shell: includes free-swimming species (genus Pecten) and species attached to a substratum (genus Chlamys)
2. the edible adductor muscle of certain of these molluscs
3. either of the shell valves of any of these molluscs
4. the shape of a scallop shell used as the badge of a pilgrim, esp in the Middle Ages
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
Scallop
One of a continuous series of curves resembling segments of a circle, used as a decorative element on the outer edge of a strip of wood used as a molding.

Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
scallop
[′skäl·əp] (invertebrate zoology)
Any of various bivalve mollusks in the family Pectinidae distinguished by radially ribbed valves with undulated margins.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
scallop
scallops: a scalloped molding
One of a continuous series of curves resembling segments of a circle, used as a decorative element on the outer edge of a strip of wood, molding etc.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
SCALLOP
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