The Collaborative International Dictionary of English v.0.48:

Coquettish \Co*quet"tish\, a.
   Practicing or exhibiting coquetry; alluring; enticing.
   [1913 Webster]

         A pretty, coquettish housemaid.          --W. Irving.
   [1913 Webster]

WordNet (r) 3.0 (2006):

coquettish
    adj 1: like a coquette [syn: coquettish, flirtatious]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "coquettish":
   alluring, amative, amatory, appealing, appetizing, arch,
   attractive, beguiling, bewitching, blandishing, cajoling,
   captivating, caressive, catching, changeable, charismatic,
   charming, coaxing, come-hither, coy, enchanting, engaging,
   enravishing, enthralling, enticing, entrancing, exciting, exotic,
   faddish, fascinating, fetching, fickle, flighty, flirtatious,
   flirty, glamorous, hypnotic, inconstant, interesting, intriguing,
   inviting, irresistible, light, mercurial, mesmeric, mouth-watering,
   piquant, prepossessing, provocative, provoquant, quicksilver,
   ravishing, roguish, seducing, seductive, sexual, siren, sirenic,
   skittish, spellbinding, spellful, taking, tantalizing, teasing,
   tempting, tickling, titillating, titillative, toying, undependable,
   unpredictable, unreliable, vacillating, versatile, volatile,
   winning, winsome, witching