The Collaborative International Dictionary
Agnoiology
Agnoiology \Ag`noi*ol"o*gy\ ([a^]g`noi*[o^]l"[-o]*j[y^]), n. [Gr. 'a`gnoia ignorance + -logy.] (Metaph.) The doctrine concerning those things of which we are necessarily ignorant. [1913 Webster] ||
Wiktionary
agnoiology
n. The study of things of which cannot be known.