Lancet/ˈlænsɪt/ Definition 1 of 3Pro Tip 1/3Medical Precision Used for precise cuts in surgery, implying careful work. Please hand me the lancet for this delicate procedure. Pro Tip 2/3Surgical Tool Relates to small surgical instruments, not to be confused with regular knives. Ensure the lancet is sterilized before the operation begins. Pro Tip 3/3Professional Context Mainly used in professional medical settings, not common in everyday conversation. The medical student learned how to properly use a lancet.