The Collaborative International Dictionary of English v.0.48:

Scallop \Scal"lop\ (?; 277), n. [OF. escalope a shell, probably
   of German or Dutch origin, and akin to E. scale of a fish;
   cf. D. schelp shell. See Scale of a fish, and cf.
   Escalop.] [Written also scollop.]
   1. (Zool.) Any one of numerous species of marine bivalve
      mollusks of the genus Pecten and allied genera of the
      family Pectinidae. The shell is usually radially ribbed,
      and the edge is therefore often undulated in a
      characteristic manner. The large adductor muscle of some
      the species is much used as food. One species (Vola
      Jacobaeus) occurs on the coast of Palestine, and its
      shell was formerly worn by pilgrims as a mark that they
      had been to the Holy Land. Called also fan shell. See
      Pecten, 2.
      [1913 Webster]

   Note: The common edible scallop of the Eastern United States
         is Pecten irradians; the large sea scallop, also used
         as food, is Pecten Clintonius syn. Pecten
         tenuicostatus.
         [1913 Webster]

   2. One of series of segments of circles joined at their
      extremities, forming a border like the edge or surface of
      a scallop shell.
      [1913 Webster]

   3. One of the shells of a scallop; also, a dish resembling a
      scallop shell.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

   2. (Cookery) To bake in scallop shells or dishes; to prepare
      with crumbs of bread or cracker, and bake. See Scalloped
      oysters, below.
      [1913 Webster]

WordNet (r) 3.0 (2006):

scallop
    n 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,
         crenelle]
    2: edible muscle of mollusks having fan-shaped shells; served
       broiled or poached or in salads or cream sauces [syn:
       scallop, scollop, escallop]
    3: thin slice of meat (especially veal) usually fried or broiled
       [syn: cutlet, scallop, scollop, escallop]
    4: edible marine bivalve having a fluted fan-shaped shell that
       swim by expelling water from the shell in a series of
       snapping motions [syn: scallop, scollop, escallop]
    v 1: decorate an edge with scallops; "the dress had a scalloped
         skirt"
    2: bake in a sauce, milk, etc., often with breadcrumbs on top
       [syn: scallop, escallop]
    3: form scallops in; "scallop the meat" [syn: scallop,
       scollop]
    4: fish for scallops [syn: scallop, scollop]
    5: shape or cut in scallops; "scallop the hem of the dress"
       [syn: scallop, scollop]

Moby Thesaurus II by Grady Ward, 1.0:

135 Moby Thesaurus words for "scallop":
   Dungeness crab, Japanese crab, Vandyke, Vandyke edge,
   armadillo shell, bake, barbecue, baste, blanch, blaze, blue point,
   boil, braise, brew, broil, brown, chiton, chop, clam, clam shell,
   cockleshell, cockscomb, cocoa shell, coddle, conch, contort, cook,
   coquillage, corkscrew, cowrie, crab, crawdad, crawfish, crayfish,
   crenation, crenelation, crenellate, crenulate, crenulation, crest,
   crimp, crinkle, curry, cut, deckle edge, denticulation, dentil,
   dentil band, devil, do, do to perfection, dogtooth, eggshell, fire,
   fricassee, frizz, frizzle, fry, gash, griddle, grill, heat, incise,
   indent, intort, jag, knurl, langouste, limpet, littleneck clam,
   lobster, machicolate, meander, mill, mussel, nick, notch, notching,
   nutshell, oven-bake, oyster, oyster shell, pan, pan-broil, parboil,
   periwinkle, picot, pink, poach, prawn, prepare, prepare food,
   quahog, rickrack, roast, saute, saw, saw teeth, scarify, score,
   scotch, screw, sea shell, sear, serpentine, serrate, serration,
   shellfish, shirr, shrimp, simmer, slash, slink, snail, snake,
   soft-shell crab, steam, steamer, stew, stir-fry, swirl, toast,
   tooth, turn, twine, twirl, twist, twist and turn, whelk, whirl,
   whorl, wind, winkle, worm, wring



The Free On-line Dictionary of Computing (30 December 2018):

SCALLOP

    A medium-level language for CDC
   computers, used to bootstrap the first Pascal compiler.

   (1994-11-01)