Aaronic

of or relating to Aaron.
pertaining or belonging to the order of Jewish priests descended from Aaron.
of the second, or lesser, order of priesthood in the Church of Jesus Christ of Latter-day Saints.
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Historical Examples

But they fail to observe that he was without these things in the Aaronic priesthood.
Autobiography of Frank G. Allen, Minister of the Gospel Frank G. Allen

By Him, not by the Aaronic ministry, they are to bring their sacrifices to God.
Messages from the Epistle to the Hebrews Handley C.G. Moule

The Aaronic priesthood includes (beginning with the lowest) the offices of deacon, teacher, priest, and bishop.
The Mormon Puzzle, and How to Solve It R. W. Beers

There are two classes of priesthood: The Melchizedek and the Aaronic.
The Mormon Puzzle, and How to Solve It R. W. Beers

He could not be a priest on earth, because the Aaronic priesthood was then in force, and He was not of the Aaronic family.
Autobiography of Frank G. Allen, Minister of the Gospel Frank G. Allen

It concludes with a splendid paraphrase of the Aaronic benediction.
The Story of Our Hymns Ernest Edwin Ryden

Name the special offices in the Aaronic priesthood, in order, with a statement of the specific duties and authority of each.
The Articles of Faith James E. Talmage

The lesser branch is called the Levitical or Aaronic, because it was conferred upon Aaron and his posterity.
Cowley’s Talks on Doctrine Matthias F. Cowley

The angel then laid his hands on their heads and ordained them to the Aaronic Priesthood.
A Young Folks’ History of the Church of Jesus Christ of Latter-day Saints Nephi Anderson

I would suggest that St. Clement is considering the whole order of the Aaronic priesthood and worship as a divine appointment.
Church and State as Seen in the Formation of Christendom T. W. Allies

adjective
of or relating to Aaron, his family, or the priestly dynasty initiated by him
of or relating to the Israelite high priesthood
of or relating to the priesthood in general
(Mormon Church) denoting or relating to the second order of the Mormon priesthood