crenel

Noun

• a notch or open space between two merlons in a crenelated battlement

• 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.)

Verb

• supply with battlements

Related words

• Synonyms: 
  crenelle , scallop , crenation , crenature , crenelate , crenellate