Source : Webster's Revised Unabridged Dictionary (1913)

Serpent \Ser"pent\, v. i. [imp. & p. p. {Serpented}; p. pr. &
   vb. n. {Serpenting}.]
   To wind like a serpent; to crook about; to meander. [R.]
   ``The serpenting of the Thames.'' --Evelyn.