I am translating a 17th century letter (1630, to be exact) at the moment in which the author talks at some length about matters alchemical. In addition to having recently met a person in Holland who had achieved the opus philosophicum(!), this gent then goes on to explain how one may "mortify" metals, reducing them to a base Ens or state.
In this context, he uses the word "nicerationem". Thus:
"...so alle metallen per nicerationem zu gutem gelde tingiert werden koennen". For some reason, I can't seem to find an appropriate definition or cognate for this word in English. Can anyone assist?