_Modum Promissionis_ (Vol. ii., p. 279.).--Without the context of the
passage adduced by C.W.B., it is impossible to speak positively as to its
precise signification. I think, however, the phrase is equivalent to
"formula professionis monasticæ." _Promissio_ frequently occurs in this
sense, as may be seen by referring to Ducange (s.v.).