noumenon
noun
nou·me·non ˈnü-mə-ˌnän 
plural noumena ˈnü-mə-nə
-ˌnä
: a posited object or event as it appears in itself independent of perception by the senses
noumenal
ˈnü-mə-nᵊl
adjective 
Word History
Etymology
German, from Greek nooumenon that which is apprehended by thought, from neuter of present passive participle of noein to think, conceive, from nous mind
First Known Use
1796, in the meaning defined above