E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Extravagants Constitutions,
or Extravagants. The papal constitutions of John XXII., and some few of his successors, supplemental to the Corpus Juris Canonici. So called because they were not ranged in order with the other papal constitutions, but were left outwanderers from the general code.