scientifical

From scientific +‎ -al.

scientifical (comparative more scientifical, superlative most scientifical)

Of or pertaining to the scientific method.
- 1850, David Hartley, Observations on Man, his Frame, his Duty, and his Expectations, fourth edition, Chapter III, § II, page #329:
  In ſcientifical propoſitions concerning natural bodies a definition is made, as of gold from its properties, ſuppoſe its colour, and ſpecific gravity, and another property or power joined to them, as a conſtant or common aſſociate.
  - (Rewritten in modern spelling: In scientifical propositions concerning natural bodies a definition is made, as of gold from its properties, suppose its colour, and specific gravity, and another property or power joined to them, as a constant or common associate.)

English