Meaning of hypodorian mode

hy'po•do'ri•an mode'

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