The Collaborative International Dictionary of English v.0.48:

Circuitous \Cir*cu"i*tous\, a. [LL. circuitosus.]
   Going round in a circuit; roundabout; indirect; as, a
   circuitous road; a circuitous manner of accomplishing an end.
   -- Cir*cu"i*tous*ly, adv. -- Cir*cu"i*tous*ness, n.

   Syn: Tortuous; winding; sinuous; serpentine.
        [1913 Webster]

WordNet (r) 3.0 (2006):

circuitous
    adj 1: marked by obliqueness or indirection in speech or
           conduct; "the explanation was circuitous and puzzling";
           "a roundabout paragraph"; "hear in a roundabout way that
           her ex-husband was marrying her best friend" [syn:
           circuitous, roundabout]
    2: deviating from a straight course; "a scenic but devious
       route"; "a long and circuitous journey by train and boat"; "a
       roundabout route avoided rush-hour traffic" [syn: devious,
       circuitous, roundabout]

Moby Thesaurus II by Grady Ward, 1.0:

80 Moby Thesaurus words for "circuitous":
   O-shaped, aberrant, aberrative, ambagious, anfractuous, backhand,
   backhanded, circular, circumlocutional, circumlocutory, collateral,
   convolutional, deflectional, departing, desultory, deviant,
   deviating, deviative, deviatory, devious, digressive, discursive,
   divagational, divergent, errant, erratic, excursive, flexuose,
   flexuous, helical, indirect, involute, involuted, involutional,
   labyrinthine, left-handed, mazy, meandering, meandrous, oblique,
   orbital, out-of-the-way, periphrastic, planetary, rambling, rivose,
   rivulose, rotary, round, roundabout, roving, ruffled, serpentine,
   shifting, side, sidelong, sinister, sinistral, sinuate, sinuose,
   sinuous, snaky, spiral, stray, swerving, torsional, tortile,
   tortuous, turning, twisting, twisty, undirected, vagrant, veering,
   wandering, whorled, winding, wreathlike, wreathy, zigzag