D defs.my
Entry 1 sense Webster, 1913

Treater

/trēt'-ẽr/ · Treat·er · IPA /trˈiːtər/
01 n. One who treats; one who handles, or discourses on, a subject; also, one who entertains.
  1. 1.
    One who treats; one who handles, or discourses on, a subject; also, one who entertains.