carapace
the thick hard shield, made of chitin or bone, that covers part of the body of crabs, lobsters, tortoises, etc.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
carapace
[′kar·ə‚pās] (geology)
The upper normal limb of a fold having an almost horizontal axial plane.
(invertebrate zoology)
A dorsolateral, chitinous case covering the cephalothorax of many arthropods.
(vertebrate zoology)
The bony, dorsal part of a turtle shell.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.