סוּמְכָא, (סְמַךְ) thickness. Targ. I Kings VII, 26; a. fr.—Ḥull. 55ᵇ בסוּמְכֵיה on the thick part of the milt, opp. קולשא. Sabb. 98ᵃ ס׳ דקרש the thickness of each board. Succ. 53ᵇ ס׳ דארעא the thickness of the rind of the earth (beneath which there is water); a. e.