"of or pertaining to ontology," 1782, from ontology + -ical. Related: Ontologically
Entries linking to ontological
ontology n.
"the metaphysical science or study of being and the essence of things," 1660s (Gideon Harvey), from Modern Latin ontologia (c. 1600); see onto- + -logy. Related: Ontologist.
-ical
compound adjectival word-forming element, usually interchangeable with -ic but sometimes with specialized sense (such as historic/historical, politic/political), Middle English, from Late Latin -icalis, from Latin -icus + -alis (see -al (1)). Probably it was needed because the forms in -ic often took on a noun sense (for example physic). Forms in -ical tend to be attested earlier in English than their twins in -ic.