Hormones are chemical substances found in all animal species. They are produced by the body to regulate its development and function. The word hormone is derived from the Greek, meaning to put into motion
The Association of Petrochemicals Producers in Europe (APPE), The European petrochemical industry, Glossary of Terms on Chemical Safety for Use in IPCS Publications, van Nieuwenhuyse, Brussels 2006. http://www.petrochemistry.eu/glossary.html, (Petrochem Ind - Brit) {473}