The Collaborative International Dictionary of English v.0.48:

Circumlocution \Cir`cum*lo*cu"tion\, n. [L. circumlocutio, fr.
   circumloqui, -locutus, to make use of circumlocution; circum
   + loqui to speak. See Loquacious.]
   The use of many words to express an idea that might be
   expressed by few; indirect or roundabout language; a
   periphrase.
   [1913 Webster]

         the plain Billingsgate way of calling names . . . would
         save abundance of time lost by circumlocution. --Swift.
   [1913 Webster]

   Circumlocution office, a term of ridicule for a
      governmental office where business is delayed by passing
      through the hands of different officials.
      [1913 Webster]

WordNet (r) 3.0 (2006):

circumlocution
    n 1: a style that involves indirect ways of expressing things
         [syn: circumlocution, periphrasis, ambage]
    2: an indirect way of expressing something [syn:
       circumlocution, indirect expression]

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "circumlocution":
   ambages, anfractuosity, circling, circuition, circuitousness,
   circuitry, circularity, circulation, circumambages, circumambience,
   circumambiency, circumambulation, circumbendibus, circumflexion,
   circummigration, circumnavigation, circumvolution, convolution,
   crinkle, crinkling, deviance, deviancy, deviation, deviousness,
   digression, excursion, excursus, flexuosity, flexuousness, gyre,
   gyring, indirection, intorsion, involution, meander, meandering,
   obliqueness, orbit, orbiting, periphrase, periphrasis, pleonasm,
   redundancy, rivulation, roundabout, roundaboutness, rounding,
   sinuation, sinuosity, sinuousness, slinkiness, snakiness, spiral,
   spiraling, tautology, torsion, tortility, tortuosity, tortuousness,
   turn, turning, twisting, undulation, verbality, wave, waving,
   wheeling, winding