appraisal of the biological activity of a substance by testing its effect on an organism and comparing the result with some agreed standard | a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc. |
| an appraisal of the state of affairs |
| a written report of the results of an analysis of the composition of some substance |
| a substance that is undergoing an analysis of its components |