Unifying; having the power to shape disparate things into a unified whole.
1893: all the verses when taken together … are deficient in harmony, and consequently there is little or no fusion. The esemplastic power of the writer's feeling was not strong enough, did not extend beyond the individual verse. — Hiram Corson, A Primer of English Verse (pp. 21–22)
2003: he … developed a doctrine of the organic (‘esemplastic’) imagination, over and against the passive and mechanical faculty of ‘fancy’ — Roy Porter, Flesh in the Age of Reason (Penguin 2004, p. 405)