*kneeler*

n. 1. One who kneels or who worships by or while kneeling. Tennyson. [ 1913 Webster ]

2. A cushion or stool to kneel on, such as one attached to a pew in a church. [ 1913 Webster ]

3. (Eccl. Hist.) A name given to certain catechumens and penitents who were permitted to join only in parts of church worship. [ 1913 Webster ]