grammătĭcālis — Lewis & Short
grammătĭcālis, e, adj.grammatica,
I of or perlaining to grammar, grammatical:
figurae,Sid. Ep. 7, 9:
palaestra,id. Carm. 23, 212.—Adv.: grammătĭ-cālĭter, grammatically: declinare, Treb. XXX. Tyr. 10, § 5.