The Collaborative International Dictionary of English v.0.48:

Conjugate \Con"ju*gate\, v. t. [imp. & p. p. Conjugated; p.
   pr. & vb. n. Conjugating.]
   1. To unite in marriage; to join. [Obs.] --Sir H. Wotton.
      [1913 Webster]

   2. (Gram.) To inflect (a verb), or give in order the forms
      which it assumes in its several voices, moods, tenses,
      numbers, and persons.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

conjugated \conjugated\ adj.
   1. (Chem.) (Chem.) formed by the union of two compounds; as,
      a conjugated protein.

   Syn: conjugate.
        [WordNet 1.5]

   2. joined together especially in a pair or pairs.

   Syn: conjugate, coupled.
        [WordNet 1.5]

   3. (Chem.) containing two or more double bonds each separated
      from the other by a single bond; -- of an organic compound
      or of the double bonds thus arranged.

   Note: Conjugated double bonds have chemical and electronic
         properties different from those of isolated double
         bonds.

   Syn: conjugate.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

conjugated
    adj 1: formed by the union of two compounds; "a conjugated
           protein" [syn: conjugate, conjugated]
    2: joined together especially in a pair or pairs [syn:
       conjugate, conjugated, coupled]
    3: of an organic compound; containing two or more double bonds
       each separated from the other by a single bond [syn:
       conjugate, conjugated]