The Greek word here which we render, ‘supersubstantialis,’ is ἐπιούσιος. The LXX often make use of the word, περιούσιος, by which we find, on reference to the Hebrew, they always render the word, sogola. [ed. note, c: סְגֻלָּה on ἐπιούσιος, vid. note c on Cyr. Cat. xxiii. 15. Tr. and Petav. Dogm. t. iv. pp. 200,201. ed. Antwerp. 1700.]
Symmachus translates it ἐξαίρετος, that is, ‘chief,’ or ‘excellent,’ though in one place he has interpreted ‘peculiar.’ When then we pray God to give us our ‘peculiar’ or ‘chief’ bread, we mean Him who says in the Gospel, “I am the living bread which came down from heaven.” [John 6:51]
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).