The Collaborative International Dictionary of English v.0.48:

Sherd \Sherd\, n.
   A fragment; -- now used only in composition, as in potsherd.
   See Shard.
   [1913 Webster]

         The thigh . . . which all in sherds it drove.
                                                  --Chapman.
   [1913 Webster] Shereef

The Collaborative International Dictionary of English v.0.48:

Shard \Shard\ (sh[aum]rd), n. [AS. sceard, properly a p. p. from
   the root of scearn to shear, to cut; akin to D. schaard a
   fragment, G. scharte a notch, Icel. skar[eth]. See Shear,
   and cf. Sherd.] [Written also sheard, and sherd.]
   1. A piece or fragment of an earthen vessel, or a like
      brittle substance, as the shell of an egg or snail.
      --Shak.
      [1913 Webster]

            The precious dish
            Broke into shards of beauty on the board. --E.
                                                  Arnold.
      [1913 Webster]

   2. (Zool.) The hard wing case of a beetle.
      [1913 Webster]

            They are his shards, and he their beetle. --Shak.
      [1913 Webster]

   3. A gap in a fence. [Obs.] --Stanyhurst.
      [1913 Webster]

   4. A boundary; a division. [Obs. & R.] --Spenser.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sherd
    n 1: a broken piece of a brittle artifact [syn: shard,
         sherd, fragment]