Source : Webster's Revised Unabridged Dictionary (1913)

Clam \Clam\, n. [Cf. {Clamp}, {Clam}, v. t., {Clammy}.]
   1. (Zo["o]l.) A bivalve mollusk of many kinds, especially
      those that are edible; as, the long clam ({Mya arenaria}),
      the quahog or round clam ({Venus mercenaria}), the sea
      clam or hen clam ({Spisula solidissima}), and other
      species of the United States. The name is said to have
      been given originally to the {Tridacna gigas}, a huge East
      Indian bivalve.

            You shall scarce find any bay or shallow shore, or
            cove of sand, where you may not take many clampes,
            or lobsters, or both, at your pleasure. --Capt. John
                                                  Smith (1616).

            Clams, or clamps, is a shellfish not much unlike a
            coclke; it lieth under the sand.      --Wood (1634).

   2. (Ship Carp.) Strong pinchers or forceps.

   3. pl. (Mech.) A kind of vise, usually of wood.

   {Blood clam}. See under {Blood}.

Clam \Clam\ (cl[a^]m), v. t. [imp. & p. p. {Clammed}; p. pr. &
   vb. n. {Clamming}.] [Cf. AS. cl[ae]man to clam, smear; akin
   to Icel. kleima to smear, OHG. kleimjan, chleimen, to defile,
   or E. clammy.]
   To clog, as with glutinous or viscous matter.

         A swarm of wasps got into a honey pot, and there they
         cloyed and clammed Themselves till there was no getting
         out again.                               --L'Estrange.

Clam \Clam\, v. i.
   To be moist or glutinous; to stick; to adhere. [R.] --Dryden

Clam \Clam\, n.
   Claminess; moisture. [R.] ``The clam of death.'' --Carlyle.

Clam \Clam\, n. [Abbrev. fr. clamor.]
   A crash or clangor made by ringing all the bells of a chime
   at once. --Nares.

Clam \Clam\, v. t. & i.
   To produce, in bell ringing, a clam or clangor; to cause to
   clang. --Nares.

Source : WordNet®

clam
     v : gather clams, by digging in the sand by the ocean
     [also: {clamming}, {clammed}]

clam
     n 1: burrowing marine mollusk living on sand or mud
     2: a piece of paper money worth one dollar [syn: {dollar}, {dollar
        bill}, {one dollar bill}, {buck}]
     3: flesh of either hard-shell or soft-shell clams
     [also: {clamming}, {clammed}]

Source : Free On-Line Dictionary of Computing

CLAM
     
         A system for {symbolic mathematics},
        especially General Relativity.  It was first implemented in
        {ATLAS} {assembly language} and later {Lisp}.
     
        See also {ALAM}.
     
        ["CLAM Programmer's Manual", Ray d'Inverno & Russell-Clark,
        King's College London, 1971].
     
        (1994-11-08)