Internal & external audits: first-, second-, and third-party audits. 1  A first-party audit is performed within an organization to measure its strengths and weaknesses against its own procedures or methods and/or against external standards adopted by (voluntary) or imposed on (mandatory) the organization.
Precursor (chemistry) In chemistry, a precursor is a compound that participates in a chemical reaction that produces another compound. In biochemistry, the term precursor often refers more specifically to a chemical compound preceding another in a metabolic pathway, such as a protein precursor. 1 Illicit drug precursors.
2. (often cap.) one's own father. 3. a father-in-law, stepfather, adoptive father, or foster father. 4. any male ancestor; forefather; progenitor. 5. a man who gives paternal care to others; protector or provider. 6. a person who has originated or established something. 7. a precursor, prototype, or early form. 8. one of the leading men in a city, town, etc. 9. a priest or a title for a priest.