ˌepēgȯˈnä.ˌtyȯn noun
( -s )
Etymology: New Greek, diminutive of Late Greek epigonatis kneecap, from Greek epi- + gonat-, gony knee — more at knee
Eastern Orthodox Church : a rhombic vestment usually of stiff material worn by a bishop or certain other ecclesiastical dignitaries on the right hip as a sign of authority and rank