1. [n]  (British) a unit of weight for wool equal to about 28 pounds
2. [adj]  (British) alone and on your own; "don't just sit there on your tod"

TOD is a 3 letter word that starts with T.

1. \Tod\ (t[o^]d), n. [Akin to D. todde a rag, G. zotte shag,
   rag, a tuft of hair, Icel. toddi a piece of a thing, a tod of
   wool.]
   1. A bush; a thick shrub; a bushy clump. [R.] ``An ivy
      todde.'' --Spenser.
   
            The ivy tod is heavy with snow.       --Coleridge.
   
   2. An old weight used in weighing wool, being usually
      twenty-eight pounds.
   
   3. A fox; -- probably so named from its bushy tail.
   
            The wolf, the tod, the brock.         --B. Jonson.
   
   {Tod stove}, a close stove adapted for burning small round
      wood, twigs, etc. [U. S.] --Knight.
   
   

2. \Tod\, v. t. & i.
   To weigh; to yield in tods. [Obs.]