Meaning of hypoaeolian mode

hy'po•ae•o'li•an mode'

Pronunciation: (hī'pō-ē-ō'lē-un, hī"-), [key]
— Music. Music.
  1. a plagal church mode represented on the white keys of a keyboard instrument by an ascending scale from E to E, with the final on A.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.