[ Steroid ]
Any of a class of [ Organic ] 1. Relating to or denoting chemical compounds of biological origin. In organic chemistry, compounds which containing carbon chains, as in organic_chemistry Some carbon-containing compounds such as carbides, carbonates, simple oxides (carbon monoxide and carbon dioxide), and cyanides More compounds that contains four rings of carbon atoms (three six-membered and one five). They include certain alkaloids, [ hormone ] A substance that acts as a signal between organs and tissue to regulate physiology and behaviour. Hormones are secreted directly into the circulatory system by specialised cells in glands and other organs. They regulate metabolic activities, growth More and vitamins.