(1):

(n.) The act of transmuting, or the state of being transmuted; as, the transmutation of metals.

(2):

(n.) The change or reduction of one figure or body into another of the same area or solidity, but of a different form, as of a triangle into a square.

(3):

(n.) The change of one species into another, which is assumed to take place in any development theory of life; transformism.