The Collaborative International Dictionary of English v.0.48:

Tiliaceous \Til`i*a"ceous\, a. [OE. tilia the linden tree.]
   (Bot.)
   Of, pertaining to, or resembling, a natural family of plants
   (Tiliaceae) of which the linden (Tilia) is the type. The
   family includes many plants which furnish a valuable fiber,
   as the jute.
   [1913 Webster +PJC]