cosmiann.
Etymology: < Greek κόσμιος of the world, secular, < κόσμος the world.Previous versions of the OED give the stress as: ˈcosmian.
the world > the universe > cosmology > science of observation > theory > [noun] > person who holds
1842 J. Stewart (title) The Bible of Nature, condensed from the Scriptures of Eminent Cosmians, Pantheists and Physiphilanthropists.
This entry has not yet been fully updated (first published 1893; most recently modified version published online June 2019).