Noun

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.)
2. Edible muscle of mollusks having fan-shaped shells; served broiled or poached or in salads or cream sauces
3. Thin slice of meat (especially veal) usually fried or broiled
4. Edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions

Verb

1. Decorate an edge with scallops
2. Bake in a sauce, milk, etc., often with breadcrumbs on top
3. Form scallops in
4. Fish for scallops
5. Shape or cut in scallops