The Collaborative International Dictionary of English v.0.48:

Dilucid \Di*lu"cid\, a. [L. dilucidus, fr. dilucere to be light
   enough to distinguish objects apart. See Lucid.]
   Clear; lucid. [Obs.] --Bacon. -- Di*lu"cid*ly, adv. [Obs.]
   -- Di`lu*cid"i*ty, n. [Obs.]
   [1913 Webster]