(noun) A chemical is a either a chemical element or a material with a defined composition of such elements: a chemical compound. (see also molecule). The term is often used to refer to bulk material, rather than to individual microscopic or submicroscopic particles, e.g., "A chemical is a specific collection of atoms or molecules."
(noun) Chemicals is the industry or trade of producing or manipulating such chemicals.
... County, Hawaii), he contracted the disease, from which he died at the colony.
He is the patron of lepers and outcasts, and was recently made the patron of AIDS patients. ...