Definition: Nematocidal is a medical term that refers to a substance or product that causes death by causing damage or injury to cells in the body. It's often used in the context of medical treatments for diseases like cancer, which can be caused by harmful substances such as radiation, chemicals, or viruses. For example, if someone is exposed to a radioactive material during a treatment for cancer, their body may experience damage or illness due to the high levels of radioactivity. This is known as a "