biography noun A written account of someone else's life, based on research and documented facts. He read a biography of Abraham Lincoln over the summer break. + biology noun The scientific study of living organisms, including their structure, function, growth, and evolution. In biology class, we dissected a frog to study its internal organs. + biologist noun A scientist who studies living organisms and their processes. The marine biologist spent months tracking whale migration patterns. + biological adjective Relating to biology, living organisms, or the natural processes of life. Scientists study the biological effects of climate change on coral reef ecosystems. + biodegradable adjective Capable of being broken down naturally by bacteria or other living organisms. The company switched to biodegradable packaging to reduce plastic waste. + biodiversity noun The variety of plant and animal life found in a particular habitat or the world. Rainforests contain an extraordinary level of biodiversity compared to most other ecosystems. + bioethics noun The study of ethical issues arising from advances in biology, medicine, and healthcare. Bioethics committees debate the moral limits of gene editing in humans. + biofuel noun Fuel produced from living matter, such as plants or algae, rather than fossil sources. The bus fleet now runs on biofuel made from recycled cooking oil. + biohazard noun A biological substance, such as a virus or contaminated material, that poses a risk to human health. The lab technician disposed of the used needles in a marked biohazard bin. + biome noun A large natural community of plants and animals adapted to a specific climate and environment. The tundra is a biome characterized by cold temperatures and low vegetation. + biopsy noun A medical procedure that removes a small sample of tissue for laboratory examination. The doctor ordered a biopsy of the lump to check whether the cells were cancerous. + biotechnology noun The use of living organisms or biological processes to develop products and technologies. Biotechnology companies are engineering bacteria that can break down plastic waste more quickly. + bionic adjective Having mechanical or electronic body parts that give a person abilities beyond normal human limits. The injured veteran received a bionic arm controlled by his own nerve signals. + biosphere noun The parts of Earth's surface, water, and atmosphere where living organisms exist. Scientists study how pollution affects the delicate balance of the biosphere. + autobiography noun A written account of a person's own life, composed by that person. In her autobiography, the astronaut described her difficult journey to becoming a pilot. + symbiosis noun A close, long-term relationship between two different organisms, typically benefiting at least one of them. The clownfish and the anemone live in a symbiosis that protects both from predators. + 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. + biochemistry noun The branch of science that studies the chemical processes and substances occurring within living organisms. She earned a degree in biochemistry before going on to study medicine. + biomass noun Organic matter, especially plant material, used as fuel or measured as a source of energy. The power plant burns biomass such as wood chips to generate electricity. + biomechanics noun The scientific study of the structure and movement of living organisms using principles of mechanics. The physiotherapist studied biomechanics to understand why the runner's knee kept buckling under stress. + biomedical adjective Relating to the application of biological and physiological principles to medicine and clinical practice. The university opened a biomedical research center to develop new treatments for chronic diseases. + biometric adjective Relating to the measurement and analysis of unique physical or behavioral traits for identification. Airport security now uses biometric scanners that check fingerprints and facial features at the gate. + bioengineering noun The application of engineering principles to biology and medicine, such as designing medical devices or tissues. Bioengineering researchers developed an artificial heart valve using flexible new materials. + biofeedback noun A technique that uses monitoring devices to help people consciously control bodily functions like heart rate. Biofeedback training helped her lower her heart rate during stressful moments. +