GlossarySebaceous Glands: Secretary glands of skin that open into hair follicles and skin pores and are widely distributed on the body.Sebum: Fatty substance secreted by sebaceous glands to lubricate the skin. Retinoids: Vitamin A or a vitamin A-like compoundsContraceptives: Prevents pregnancy.Steroids: Drugs used to relieve swelling and inflammation. Published on Dec 09, 2015Last Updated on Aug 05, 2016