است

أُسْتِىٌّ ذ The warp of cloth; (K;) as also أُسْدِىٌّ and أُزْدِىٌّ: (TA:) but it is improperly mentioned in this art.; for it is [originally أُسْتُوىٌ,] of the measure أُفْعُولٌ. (K.)