E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Crux Pectoralis.
The cross which bishops of the Church of Rome suspend over their breast.
1
Crucem cum pretioso ligno vel cum reliquis Sanctorum ante pectus portare suspensum ad collum, hoc est quod vocant encolpium [or crux Pectorlis].See Ducange, vol. iii. p. 302, col. 2, article ENCOLPIUM.