excipient

in toxicology
https://doi.org/10.1351/goldbook.E02245
Any more or less @I03026@ substance added to a @D01863@ to give suitable @C01279@ or form to the @D01863@.
Source:
PAC, 1993, 65, 2003. (Glossary for chemists of terms used in toxicology (IUPAC Recommendations 1993)) on page 2046 [Terms] [Paper]