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.). Synonyms:crenation, crenature, crenel, scallop.
2.
A notch or open space between two merlons in a crenelated battlement. Synonym:crenel.
