(formerly) an allowance according to weight granted to purchasers for waste due to transportation. It was calculated after deduction for tare
Word origin
C15: from Old French trait pull, tilt of the scale; see trait
tret in American English
(trɛt)
noun
a fixed allowance by weight, after the deduction of tare, formerly made to buyers of certain commodities to compensate for waste and deterioration during transit
Word origin
Anglo-Fr (Fr trait), a pull < OFr traire (< L trahere, to draw)