prelusive

from The Collaborative International Dictionary of English v.0.48

Prelusive \Pre*lu"sive\, a. [See {Prelude}.]
   Of the nature of a prelude; introductory; indicating that
   something of a like kind is to follow. "Prelusive drops."
   --Thomson. --{Pre*lu"sive*ly}, adv.
   [1913 Webster]