The Collaborative International Dictionary of English v.0.48:

Pelagian \Pe*la"gi*an\, a. [Cf. F. p['e]lagien.]
   Of or pertaining to Pelagius, or to his doctrines.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pelagian \Pe*la"gi*an\, a. [L. pelagius, Gr. pela`gios, fr.
   pe`lagos the sea: cf. F. p['e]lagien.]
   Of or pertaining to the sea; marine; pelagic; as, pelagian
   shells.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pelagian \Pe*la"gi*an\, n. [L. Pelagianus: cf. F. p['e]lagien.]
   (Eccl. Hist.)
   A follower of Pelagius, a British monk, born in the later
   part of the 4th century, who denied the doctrines of
   hereditary sin, of the connection between sin and death, and
   of conversion through grace.
   [1913 Webster]