The Collaborative International Dictionary of English v.0.48:

Cambial \Cam"bi*al\, a. [LL. cambialis, fr. cambiars. See
   Change.]
   Belonging to exchanges in commerce; of exchange. [R.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

cambial
    adj 1: of or relating to or functioning as a cambium