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The Collaborative International Dictionary
Anticyclonically

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.

Wiktionary
anticyclonically

adv. In an anticyclonic fashion.