inhibitor definition biology
inhibitor - a substance that retards or stops an activity. substance - a particular kind or species of matter with uniform properties; shigella is one of the most toxic substances known to man. angiotensin II inhibitor - an agent that retards or restrains the action of angiotensin II. antioxidant - substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides. anticatalyst - (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst.