antibiotic noun A medicine used to treat infections by killing or stopping the growth of bacteria. The doctor prescribed antibiotics to clear up the ear infection. + antibody noun A protein produced by the immune system to identify and neutralize harmful invaders such as bacteria or viruses. After the infection cleared, her blood still contained antibodies that could fight the virus. + anticipate verb To expect something and prepare for it, or to look forward to it with excitement. Organizers anticipated a large crowd and hired extra staff for the festival. + antidote noun A substance that counteracts a particular poison, or something that relieves an unpleasant situation. Paramedics administered the antidote quickly after the child swallowed the chemical. + antifreeze noun A liquid added to a vehicle's cooling system to lower its freezing point and prevent engine damage. He checked the antifreeze level before the first frost of winter arrived. + antihero noun A central character in a story who lacks traditional heroic qualities such as courage or morality. The gritty detective is an antihero who bends the law to get results. + antioxidant noun A substance that protects cells from damage caused by unstable molecules called free radicals. Blueberries are often praised for their high level of antioxidants. + antiperspirant noun A personal care product applied to the skin to reduce sweating, usually under the arms. He applies antiperspirant every morning before getting dressed for work. + antiseptic adjective Preventing infection by destroying or inhibiting the growth of harmful microorganisms on the skin or a wound. The nurse cleaned the cut with an antiseptic solution before applying the bandage. + antisocial adjective Unwilling or unable to interact with other people, or harmful to the order of society. He felt too antisocial after a long week to attend the office party. + antithesis noun The exact opposite of something, especially when the contrast is deliberate or striking. Her calm, orderly office is the antithesis of her chaotic home workspace. + antitrust adjective Relating to laws that prevent unfair business monopolies and promote competition in the marketplace. Regulators launched an antitrust investigation into the tech company's dominant market position. + antivirus noun Software designed to detect, block, and remove malicious programs from a computer. She installed antivirus software after her laptop started running unusually slowly. + antiwar adjective Opposed to a specific war, or to war and military conflict in general. Thousands of students joined the antiwar protest outside the government building. + antibacterial adjective Able to destroy or slow the growth of bacteria. She wiped the kitchen counter with an antibacterial spray after cutting raw chicken. + antiaging adjective Designed to slow down or reduce the visible signs of growing older, especially on the skin. The company markets an expensive antiaging cream that promises to reduce fine lines. + antimatter noun Matter composed of particles that are the exact opposite of ordinary matter's particles in electric charge. Physicists produce tiny amounts of antimatter in particle accelerators to study its properties. + antiterrorism adjective Relating to actions, laws, or policies designed to prevent or respond to terrorist attacks. The government passed new antiterrorism legislation after the attack on the capital. + antidepressant noun A medicine prescribed to relieve or prevent the symptoms of depression. Her doctor prescribed an antidepressant along with weekly therapy sessions. + antipathy noun A strong feeling of dislike or opposition toward someone or something. His antipathy toward modern art was obvious from the way he avoided the gallery. + antigen noun A substance that the body recognizes as foreign and that triggers an immune response. The rapid test detects a viral antigen in a sample from the nose. + antinuclear adjective Opposed to nuclear weapons, nuclear power plants, or nuclear testing. Thousands joined the antinuclear march to protest the construction of a new power plant. + antiglare adjective Designed to reduce or eliminate reflected light that makes a screen or surface hard to see. He bought an antiglare screen protector to use his laptop comfortably outdoors. + antifungal adjective Able to destroy or stop the growth of fungi, such as those causing skin or nail infections. The pharmacist recommended an antifungal cream for the itchy rash on his foot. + antifraud adjective Intended to detect, prevent, or punish dishonest schemes to obtain money illegally. The bank installed new antifraud software to flag suspicious credit card transactions instantly. + antihistamine noun A drug that relieves allergy symptoms by blocking the effects of histamine in the body. She took an antihistamine before the trip to control her seasonal pollen allergy. + antigravity adjective Counteracting or appearing to counteract the normal pull of gravity. The science fiction film featured cars that used antigravity technology to float above the road. + antipode noun The exact opposite of something, or a point on the globe diametrically opposite a given place. Quiet contemplation is the antipode of the chaos the family experienced during the move. +