Source : Webster's Revised Unabridged Dictionary (1913)

Scallop \Scal"lop\, v. t. [imp. & p. p. {Scalloped}; p. pr. &
   vb. n. {Scalloping}.]
   1. To mark or cut the edge or border of into segments of
      circles, like the edge or surface of a scallop shell. See
      {Scallop}, n., 2.

   2. (Cookery) To bake in scallop shells or dishes; to prepare
      with crumbs of bread or cracker, and bake. See {Scalloped
      oysters}, below.

Scalloped \Scal"loped\, a.
   1. Furnished with a scallop; made or done with or in a
      scallop.

   2. Having the edge or border cut or marked with segments of
      circles. See {Scallop}, n., 2.

   3. (Cookery) Baked in a scallop; cooked with crumbs.

   {Scalloped oysters} (Cookery), opened oysters baked in a deep
      dish with alternate layers of bread or cracker crumbs,
      seasoned with pepper, nutmeg, and butter. This was at
      first done in scallop shells.

Source : WordNet®

scalloped
     adj : having a margin with rounded scallops [syn: {crenate}, {crenated}]