ˈsiˌdu̇(ə)r, -u̇ə, -_də(r) noun
( plural sid·du·rim sə̇ˈdu̇rə̇m ; also siddurs )
Etymology: Middle Hebrew siddūr, literally, order, arrangement, short for Hebrew sēder tĕfillōth order of prayers
: a Jewish prayer book containing both Hebrew and Aramaic prayers used chiefly in the daily liturgy — compare mahzor