1. Pertaining to higher institution of learning; academic: Such academica studies involve the literary or classical aspects rather than the technical or vocational facets of the subject matters. .
2. Referring to the school or philosophy of Plato: Some of the academical theories of Plato contrast the abstract things, or entities, with objects in the material world.

The cap and gown used for educational purposes (used in the plural): In Great Britain students and officers wear academicals at their school or college.