epistemology
Concise Oxford English Dictionary © 2008 Oxford University Press:
epistemology /ɪˌpɪstɪˈmɒlədʒi, ɛ-/
▶noun Philosophy the theory of knowledge, especially with regard to its methods, validity, and scope.
– derivatives
epistemic adjective,
epistemically adverb,
epistemological adjective,
epistemologically adverb,
epistemologist noun.
epistemic adjective,
epistemically adverb,
epistemological adjective,
epistemologically adverb,
epistemologist noun.
– origin C19: from Gk epistēmē ‘knowledge’.
'epistemology' also found in these Oxford entries:

