The definition of silk is something smooth like or made of the very soft and fine threads spun by silkworms. An example of silk is smooth and creamy chocolate truffles; silk truffles.
Biologic response modifiers, also known as biologics, are medications that were designed to prevent or reduce the inflammation that damages joints. Biologics target molecules on cells of the immune system, joint, and the products that are secreted in the joint, all of which can cause inflammation and joint destruction.
Drugs versus Biologics. 1  A biologic is manufactured in a living system such as a microorganism, or plant or animal cells.  A drug is typically manufactured through chemical synthesis, which means that it is made by combining specific chemical ingredients in an ordered process.