The Collaborative International Dictionary of English v.0.48:

Retrocede \Re"tro*cede\, v. t. [Pref. retro- + cede: cf. F.
   r['e]troc['e]der.]
   To cede or grant back; as, to retrocede a territory to a
   former proprietor.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Retrocede \Re"tro*cede\, v. i. [L. retrocedere; retro backward,
   back + cedere to go. See Cede.]
   To go back.
   [1913 Webster]