Esemplastic is an adjective which refers to the ability to mould diverse elements or concepts into a unified whole. The word was first used in 1817 by the poet Samuel Taylor Coleridge in his Biographia Literaria; Coleridge coined the word, apparently after the German word Ineinsbildung, "forming into one", but his neologism was formed from Greek roots: es, "into", en, "one", and plastic, as in malleable.
Thanks to A.Word.A.Day.