Obs. Also 7 -our, -or. [f. prec. sb. or vb. + -ER1.] The writer of a treatise.
1604. Hieron, Wks., I. 518. I remember a saying of S. Hieromes; I know that I otherwise esteeme of the apostles then of other treatisers.
1610. Bp. Hall, Apol. Brownists, lv. 136. The poysoned workes of Origen, and other dangerous Treatisours.
1637. C. Dow, Answ. to H. Burton, 169. Answering a Popish treatisor.
1646. R. Baillie, Anabaptism (1647), 178. Unto those Arguments the Treatiser adds nothing considerable.