Enzymes Meaning of Enzymes: Enzymes are substances that speed up chemical reactions in the body. Also See: AVN944 Activase Adenopathy Antifungal Antisense agent Alkalinity Aminolevulinic acid hydrochloride Antilymphocyte Globulin Listen Anus Anti-VEGFR-2 fully human monoclonal antibody IMC-1121B ALSO SEE: Arzoxifene hydrochloride