tractōrĭus, a, um, adj. [traho]. I.Of or for drawing or hoisting: genus machinarum, Vitr. 10, 1.—II.Substt.: tractō-rĭa, ae, f. (sc. epistula), a letter of invitation or summons, Aug. Ep. 217.—B. trac-tōrĭae, ārum, f. (sc. litterae), an imperial letter containing an order to provide a person with necessaries on his journey: de tractoriis et stativis, Cod. Just. 15, 52.