Word Study
epistemic
CIDE DICTIONARY
epistemic, adj.
of or pertaining to epistemology; as, epistemic modal. [WordNet 1.5]
OXFORD DICTIONARY
epistemic, adj. Philos. relating to knowledge or to the degree of its validation.
Derivative
epistemically adv.
Etymology
Gk episteme knowledge
For further exploring for "epistemic" in Webster Dictionary Online