Noun
The act of bending the knee, particularly in worship.
Source: Webster's dictionaryAccording to the General Instruction of the Roman Missal, “a genuflection, made by bending the right knee to the ground, signifies adoration, and therefore it is reserved for the Most Blessed Sacrament” (No. 274). Source: Internet
Another interesting section involved a series of “practical tips” for Adoration, such as the importance of genuflection and kneeling that was beneficial even for a person reasonably knowledgeable about their faith. Source: Internet
It is celebrated at the time of ninth hour (3:00pm) on the Sunday of Pentecost by a special three-segment prayer known as the "Office of Genuflection (Kneeling Prayer)". Source: Internet