Once again, directly realted to the issue of the LXX use of these "terms" is:
That in what is ostensibly the first Christian singing-in-worship book is a composition, labeled Psalmos which is entirely without the Hebrew canon. "Psalm" 151.
That in what is ostensibly the first Christian singing-in-worship book is a composition, labeled Psalmos which is entirely without the Hebrew canon. "Psalm" 151.