The Collaborative International Dictionary of English v.0.48:

Plat \Plat\, v. t. [imp. & p. p. Platted; p. pr. & vb. n.
   Platting.] [See Plait.]
   To form by interlaying interweaving; to braid; to plait.
   "They had platted a crown of thorns." --Matt. xxvii. 29.
   [1913 Webster]