Sajdah is the act of prostration in the Salat, when seven portions of the body touch the earth: the forehead on pure ground, two palms, two knees, and the two big toes. The two Sajdahs together are called sajdatain.
SAJDAH
Meaning of SAJDAH in English
Advanced Islamic English dictionary. Расширенный исламский словарь английского языка. 2012