סְתִידְרָאוֹת, (Hithpa. noun of סָדַר, as שְׁתַחְוָיָה for הִשְׁתַּחְוָיָה; cmp. אִסְתְּדִירָא, אִסְטְרִידָא) riggings, sail-yards. Ab. d’R. N. ch. XXXI ס׳ בעולם ס׳ באדם וכ׳ there are sail-yards in the world, and so there are sail-yards in the structure of man, that is, his two arms.