BT BB 73b(38) :והוה בהדן ההוא טייעא דהוה מורח בעפרא‏ : there was a certain Arab with us who used to smell the earth (to determine which direction to follow)
See the entire entry for ṭyˁˀ n.m. Arab

BT BB 73b(38) :ההוא טייעא דהוה מורח בעפרא‏ : a certain Arab who used to smell the earth (to determine which direction to follow)
See the entire entry for rwḥ vb. to breathe easily; D to placate