[L. tertius third.] In some public schools, appended to a surname to designate the youngest (in age or standing) of three boys of that name. Cf. MAJOR A. 7 c, MINOR A. 7 b, PRIMUS A. 2, SECUNDUS.
1870. (At Mill Hill School this year there were) Smith Major, Minor, and Tertius.
1899. Kipling, Stalky, vi. 175. The Head called them over, too—majors, minors, and tertiuses.
