BT Šab 109b(20) :ומגידי דרוביא‏ : the fibers of the r'-plant
See the entire entry for gyāḏ, gyāḏā n.m. sinew, nerve

BT Šab 109b(20) :מגידי דרוביא‏ : the fibers of thee r'-plant
See the entire entry for rwbyˀ n.m. a type of legume