The Collaborative International Dictionary of English v.0.48:

Anticyclone \An"ti*cy`clone\ ([a^]n"t[i^]*s[imac]`kl[=o]n), n.
   (Meteorol.)
   A movement of the atmosphere opposite in character, as
   regards direction of the wind and distribution of barometric
   pressure, to that of a cyclone. -- An`ti*cy*clon"ic, a. --
   An`ti*cy*clon"ic*al*ly, adv.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

anticyclonic \anticyclonic\ adj.
   1. of or pertaining to an anticyclone; moving in the opposite
      direction of a cyclone.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

anticyclonic
    adj 1: of or relating to or characteristic of the atmosphere
           around a high pressure center