• Having four ways meeting in a point; leading in four directions.
  • Belonging to the quadrivium: thus, <em>quadrivial astrology</em> is astrology in the sense in which astrology is a branch of the quadrivium — that is, astronomy.
  • One of the four arts constituting the quadrivium.
  • Having four ways meeting in a point.
  • One of the four “liberal arts” making up the quadrivium.
  • Any of the four "liberal arts" making up the <xref>quadrivium</xref>.
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