n. Science of knowing everything; beyond academic intellect; an optimal development of the brain & it's adjuct human body; knowing how to know
"Omni" means everything like in omnivorous
"logy" is like in biology
In old times, esp. in dualism period, people used to believe that knowing everything isn't possible in terms of each and every SCIENCE. Omnilogy is a branch of science that deals with learning & retaining information about all the rest of the sciences involved in humanity. What they used to call genius in old times is now simply an omnilogist.