The Collaborative International Dictionary of English v.0.48:

Zingiberaceous \Zin`gi*ber*a"ceous\
   (z[i^]n`j[i^]*b[~e]r*[=a]"sh[u^]s), a. [L. zingiber ginger.
   See Ginger.] (Bot.)
   Of or pertaining to ginger, or to a tribe (Zingibereae) of
   endogenous plants of the order Scitamineae. See
   Scitamineous.
   [1913 Webster]