n.
Pronunciation: ri- ' t ā -n ə r
Function: noun
Date: 1540
1 a : a person attached or owing service to a household especially : SERVANT b : EMPLOYEE
2 : one that retains
3 : a device or structure that holds something in place: as a : the part of a dental replacement (as a bridge) by which it is made fast to adjacent natural teeth b : a dental appliance used to hold teeth in correct position especially following orthodontic treatment