The Collaborative International Dictionary of English v.0.48:

Rebato \Re*ba"to\ (r[-e]*b[=a]"t[-o]), n.
   Same as Rabato. --Burton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rebato
    n 1: a wired or starched collar of intricate lace; worn in 17th
         century [syn: rabato, rebato]