ataractic

from WordNet (r) 3.0 (2006)

ataractic
    adj 1: tending to soothe or tranquilize; "valium has a
           tranquilizing effect"; "took a hot drink with sedative
           properties before going to bed" [syn: {ataractic},
           {ataraxic}, {sedative}, {tranquilizing},
           {tranquillizing}, {tranquilising}, {tranquillising}]
    n 1: a drug used to reduce stress or tension without reducing
         mental clarity [syn: {tranquilizer}, {tranquillizer},
         {tranquilliser}, {antianxiety agent}, {ataractic drug},
         {ataractic agent}, {ataractic}]

from The Collaborative International Dictionary of English v.0.48

ataractic \ataractic\ ataraxic \ataraxic\adj.
   1. tending to soothe or calm or tranquilize

   Syn: calming, sedative, soothing, tranquilizing
        [WordNet 1.5]

from The Collaborative International Dictionary of English v.0.48

ataractic \ataractic\ n.
   1. 1 drug that reduces nervous tension and gives peace of
      mind.

   Syn: ataraxic
        [WordNet 1.5] Ataraxia