The Collaborative International Dictionary of English v.0.48:

Laminar \Lam"i*nar\, Laminal \Lam"i*nal\, a. [Cf. F. laminaire.
   See Lamina]
   In, or consisting of, thin plates or layers; having the form
   of a thin plate or lamina.
   [1913 Webster]

WordNet (r) 3.0 (2006):

laminal
    adj 1: arranged in or consisting of laminae [syn: laminar,
           laminal]