(biochemistry) A tachykinin neuropeptide associated with inflammatory processes and pain.

A pure chemical substance consisting of a single element (e.g. hydrogen gas).

With respect to substance.

The essential meaning of written or spoken words; gist, crux.

plural of polyfluoroalkyl substance

plural of perfluoroalkyl substance

(chemistry) Any group of man-made chemicals created for a variety of household and industrial uses.

(chemistry) Any group of man-made chemicals created for a variety of household and industrial uses.

(officialese, law) A drug or chemical whose use, possession, manufacture, or sale is regulated or banned by the government.

plural of amount of substance