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, crenelle, scallop.

A notch or open space between two merlons in a crenelated battlement.

synonym: crenelle.

Supply with battlements.

synonyms: crenelate, crenellate.