crenature

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A rounded projection; a crenation.

from The Century Dictionary.

• noun In botany, a tooth of a crenate leaf, or of any other crenate part.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) A rounded tooth or notch of a crenate leaf, or any part that is crenate; -- called also crenelle.
• noun The state of being crenated or notched.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany A rounded tooth or notch of a crenate leaf, or any part that is crenate; a crenelle.
• noun The state of being crenated or notched.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.)