The Collaborative International Dictionary of English v.0.48:

Sheth \Sheth\, n.
   The part of a plow which projects downward beneath the beam,
   for holding the share and other working parts; -- also called
   standard, or post.
   [1913 Webster]

Easton's 1897 Bible Dictionary:

Sheth
   tumult. (1.) "The children of Sheth" (Num. 24:17); R.V., "the
   sons of tumult," which is probably the correct rendering, as
   there is no evidence that this is a proper name here.

     (2.) The antediluvian patriarch (1 Chr. 1:1).