transmutation
Concise Oxford English Dictionary © 2008 Oxford University Press:
transmutation /tranzmjuːˈteɪʃ(ə)n, trɑːnz-, -ns-/
▶noun the action of transmuting or the state of being transmuted.
■ the changing of one chemical element into another, either by a nuclear process or as a supposed operation in alchemy.
– derivatives
transmutational adjective,
transmutationist noun.
transmutational adjective,
transmutationist noun.
'transmutation' also found in these Oxford entries:

