COSMOTHETIC
Etymology
Adjective
cosmothetic (not comparable)
(philosophy) Assuming or positing the actual existence or reality of the physical or external world.
Synonym: cosmothetical
Source: Wiktionary
Cos`mo*thet"ic (kz`m-tht"k), a. Etym: [Gr. (Metaph.)
Definition: Assuming or positing the actual existence or reality of the
physical or external world. Cosmothetic idealists (Metaph.), those
who assume, without attempting to prove, the reality of external
objects as corresponding to, and being the ground of, the ideas of
which only the mind has direct cognizance.
The cosmothetic idealists . . . deny that mind is immediately
conscious of matter. Sir W. Hamilton.
Source: Webster’s Unabridged Dictionary 1913 Edition