(n)scallop, crenation, crenature, crenel, crenelleone 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.)
(n)scallop, scollop, escallopedible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions