The Collaborative International Dictionary of English v.0.48:

Flagellant \Flag"el*lant\, n. [L. flagellans, p. p. of
   flagellare: cf.F. flagellant. See Flagellate.] (Eccl.
   Hist.)
   One of a fanatical sect which flourished in Europe in the
   13th and 14th centuries, and maintained that flagellation was
   of equal virtue with baptism and the sacrament; -- called
   also disciplinant.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Disciplinant \Dis"ci*plin*ant\, n. [See Discipline.] (Eccl.
   Hist.)
   A flagellant. See Flagellant.
   [1913 Webster]