academical

1. rareBelonging to the school of Plato; believing in Plato's philosophy; sceptical .First known use First attested in the late 16th century.
2. Pertaining to a university or other form of higher education.First known use First attested in the late 16th century.

   1 more example

   This faithfull deputy of his maker and Maſter, entended no prepoſterous courſe againſt you. His breſt like the hart of a good Magiſtrate, is the Ocean whereinto all the cares of our Academicall causes empty themſelues, which hee ever ſendeth forth againe in a wiſe conveyance by the ſtreames of iuſtice

   1610, Daniell Price, The Defence of Truth Against a booke falsely called The Triumph of Truth sent over from Arras A.D. 1609 by Humfrey Leech late Minister. […] , Oxford, Lib. 2 Cap. 3, page 234

plural academicals

1. pluralplural onlyAcademic dress, consisting of a cap and gown.First known use First attested in the early 19th century.