A siddur (Hebrew: סִדּוּר sīddūr, [siˈduʁ, 'sɪdəʁ]; plural siddurim סִדּוּרִים [siduˈʁim]) is a Jewish prayer book containing a set order of daily prayers. The word siddur comes from the Hebrew root ס־ד־ר, meaning 'order.'
Other terms for prayer books are tefillot (תְּפִלּוֹת) among Sephardi Jews, tefillah among German Jews, and tiklāl (תכלאל) among Yemenite Jews.