Definition of "osmotic"

We saw them waking, we heard them sleeping, we sensed them dreaming, we were permeated completely with the strange Gray Myth of the West and the weird dark Myth of the East when morning came. All my actions since then have been dictated automatically to my subconscious by this horrible osmotic experience.

1957, Jack Kerouac, chapter 11, in On the Road, Viking Press, part 3