adjectivetrĭentālisTRIENTALIS☆ KeepMeaningthat contains a third of a footLewis & Short 1879ModernAs printed, 1879TRIENTALISLEWIS & SHORTTRIENTALIStrĭentālis, e, adj. id., I. that contains a third of a foot: materia, Vitr. 10, 6: folia, Plin. 27, 5, 17, § 34. Read the whole entry