fourth lateran council

from WordNet (r) 3.0 (2006)

Fourth Lateran Council
    n 1: the Lateran Council in 1215 was the most important council
         of the Middle Ages; issued a creed against Albigensianism,
         published reformatory decrees, promulgated the doctrine of
         transubstantiation, and clarified church doctrine on the
         Trinity and Incarnation