The Collaborative International Dictionary of English v.0.48:

Explicate \Ex"pli*cate\, a. [L. explicatus, p. p. of explicare.]
   Evolved; unfolded. --Jer. Taylor.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Explicate \Ex"pli*cate\, v. t. [imp. & p. p. Explicated; p.
   pr. & vb. n. Explicating.]
   1. To unfold; to expand; to lay open. [Obs.] "They explicate
      the leaves." --Blackmore.
      [1913 Webster]

   2. To unfold the meaning or sense of; to explain; to clear of
      difficulties or obscurity; to interpret.
      [1913 Webster]

            The last verse of his last satire is not yet
            sufficiently explicated.              --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

explicate
    v 1: make plain and comprehensible; "He explained the laws of
         physics to his students" [syn: explain, explicate]
    2: elaborate, as of theories and hypotheses; "Could you develop
       the ideas in your thesis" [syn: explicate, formulate,
       develop]

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "explicate":
   account for, allegorize, amplify, clarify, clear up, construe,
   crack, decipher, demonstrate, demythologize, descant, detail,
   develop, dilate, elaborate, elucidate, enlarge, enlarge upon,
   enlighten, euhemerize, evolve, exemplify, expand, expatiate,
   explain, explain away, exposit, expound, get across, get over,
   give reason for, give the meaning, illuminate, illustrate,
   interpret, make clear, make it clear, make plain, particularize,
   popularize, put across, put over, rationalize, rehearse in extenso,
   relate at large, shed light upon, show, show how, show the way,
   simplify, solve, spell out, throw light upon, unfold, unlock,
   unravel, vulgarize, work out