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convexion (uncountable)

  1. Dated form of convection.
    • 1942, Napier Shaw and Elaine Austin, Manual of Meteorology, Volume III., page #413:
      This remarkable transfer of the convexion is to be taken, of course, in relation to the sun’s declination and that again in relation to the transfer of air from the northern to the southern hemisphere which is expressed in the heading of chapter VI of volume II.