D defs.my
Entry 2 senses Webster, 1913

Pleader

· Plead·er · IPA /ˈpliːdə/
01 n. One who pleads; one who argues for or against; an advotate.
  1. 1.
    One who pleads; one who argues for or against; an advotate.
    “So fair a pleader any cause may gain.” Dryden.
  2. 2.
    One who draws up or forms pleas; the draughtsman of pleas or pleadings in the widest sense; as, a special pleader.(Law)