who deemed the official definition of chemistry?? help!!

chemistry

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The first definition of "Chymistry" was that of Robert Boyle in 1661 (in "The Sceptical Chymist")
"Chemistry" first appears in 1730 "Philosophical Principles of Universal Chemistry" by George Stahl

Definitions over time:
Chymistry (1661) – the subject of the material principles of mixed bodies (Boyle).
Chymistry (1663) – a scientific art, by which one learns to dissolve bodies, and draw from them the different substances on their composition, and how to unite them again, and exalt them to a higher perfection (Glaser).
Chemistry (1730) – the art of resolving mixed, compound, or aggregate bodies into their principles; and of composing such bodies from those principles (Stahl).
Chemistry (1837) – the science concerned with the laws and effects of molecular forces (Dumas).
Chemistry (1947) – the science of substances: their structure, their properties, and the reactions that change them into other substances (Pauling).
Chemistry (1998) – the study of matter and the changes it undergoes (Chang).