Pl. -trices. [L. tractātrix (Martial, in sense 1), fem. of tractātor shampooer, also one who treats of a subject: see TRACTATOR.]
1. A female shampooer. rare–1.
1874. M. Collins, Frances, II. 117. That stout Miss Susanetta, with her shrill voice, and her hands of the tractatrix, is a strange creature.
2. Geom. = TRACTRIX.
1828. in Webster; hence in later Dicts.
