The Collaborative International Dictionary of English v.0.48:

Translucent \Trans*lu"cent\, a. [L. translucens, -entis, p. pr.
   of translucere to shine through; trans across, through =
   lucere to shine. See Lucid.]
   1. Transmitting rays of light without permitting objects to
      be distinctly seen; partially transparent.
      [1913 Webster]

   2. Transparent; clear. [Poetic] "Fountain or fresh current .
      . . translucent, pure." --Milton.
      [1913 Webster]

            Replenished from the cool, translucent springs.
                                                  --Pope.
      [1913 Webster]

   Syn: Translucent, Transparent.

   Usage: A thing is translucent when it merely admits the
          passage of light, without enabling us to distinguish
          the color and outline of objects through it; it is
          transparent when we can clearly discern objects placed
          on the other side of it. Glass, water, etc., are
          transparent; ground glass is translucent; a
          translucent style.
          [1913 Webster]

WordNet (r) 3.0 (2006):

translucent
    adj 1: allowing light to pass through diffusely; "translucent
           amber"; "semitransparent curtains at the windows" [syn:
           translucent, semitransparent]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "translucent":
   apparent, clean-cut, clear, clear as crystal, clear as day,
   clear-cut, cloudless, coherent, connected, consistent, crisp,
   crystal, crystal-clear, crystalline, defined, definite, diaphanous,
   direct, distinct, explicit, express, light, lightish, lightsome,
   limpid, loud and clear, lucent, lucid, luculent, luminous, obvious,
   pellucid, perspicuous, plain, relucent, see-through, semipellucid,
   semitranslucent, serene, simple, straightforward, translucid,
   transparent, transpicuous, unambiguous, unclouded, unconfused,
   unequivocal, univocal, unmistakable, unobscured, well-defined