The Collaborative International Dictionary
Aaronical
Aaronic \Aa*ron"ic\ ([asl]*r[o^]n"[i^]k), Aaronical \Aa*ron"ic*al\ (-[i^]*kal), a. Pertaining to Aaron, the first high priest of the Jews.
Wiktionary
aaronical
a. 1 (alternative form of Aaronic English) (First attested in the early 17th century.)(R:SOED5: page=2) 2 pontifical.