Definition of "crenation" [cre•na•tion]

• A rounded projection, as on the margin of a shell. (noun)
• The condition or state of being crenate. (noun)
• A process resulting from osmosis in which red blood cells, in a hypertonic solution, undergo shrinkage and acquire a notched or scalloped surface. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Extensive crenation of superficial muscular and fascial tissue secondary to disruptor damage."
• "For one, maintaining a constant water potential of tissue fluid prevents osmotic damage to cells, either by cell lysis or crenation."