Definition of "eupeptic"

As to the self-sufficiency of this world, a successful Professor with a eupeptic body might take such a view, but if one found oneself with cancer of the stomach in a London garret, one might question the doctrine that there was no need to yearn for any state of being save that in which we found ourselves.

1925 July – 1926 May, A[rthur] Conan Doyle, “(please specify the chapter number)”, in The Land of Mist (eBook no. 0601351h.html), Australia: Project Gutenberg Australia, published April 2019