Definition of "alphabetical"

Paul, who talks about what the magical papyri do, has in his first letter to the Corinthians described basic aspects of alphabetical language.

1986, Arthur Hilary Armstrong, A. A. Armstrong, Classical Mediterranean Spirituality: Egyptian, Greek, Roman, page 486

But if an alphabeticall servility must be still urged, it may so fall out,

1644, John Milton, The Doctrine & Discipline of Divorce‎, page 31