Before revision: History of the concept The term "compound" , with a meaning similar to the modern , has been in use since at least —has been used at least since 1661 when Robert Boyle's The Sceptical Chymist was published.
After revision: History of the concept Robert Boyle alt=Portrait of Robert Boyle, c. 1740|192x192px|Robert Boyle330x330px|Title page of The Sceptical ChymistThe term "compound" — with a meaning similar to the modern —has been used at least since 1661 when Robert Boyle's The Sceptical Chymist was published.