1. 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.) • Syn: scallop, crenation, crenature, crenel • Derivationally related forms: scallop (for: scallop) • Hypernyms: curve, curved shape 2. a notch or open space between two merlons in a crenelated battlement • Syn: crenel • Derivationally related forms: crenellate, crenelate, crenellate (for: crenel), crenelate (for: crenel) • Hypernyms: space • Part Holonyms: battlement, crenelation, crenellation