LATIN DICTIONARYLexicon Latīnum
adjective

sŭper-tertĭus

Meaning

  1. one third as much more

sŭper-tertĭus, a, um, adj.; of a number,
I. one third as much more (i.e. that bears to another the ratio of 4 to 3): numerus, a transl. of the Gr. ἐπίτριτον, Censor. de Die Nat. 10, 8; 10, 11; Mart. Cap. 7, § 761 sq.

Quick answers

What does sŭper-tertĭus mean in Latin?
sŭper-tertĭus, a adjective, means “one third as much more”.