Source : Webster's Revised Unabridged Dictionary (1913)

Adjunctive \Ad*junc"tive\, a. [L. adjunctivus, fr. adjungere.
   See {Adjunct}.]
   Joining; having the quality of joining; forming an adjunct.

Adjunctive \Ad*junc"tive\, n.
   One who, or that which, is joined.

Source : WordNet®

adjunctive
     adj : joining; forming an adjunct