👉 In geometry, a castine (also known as a castor) is a point on a line or plane that divides it into two segments. It is named after the Greek god Castor, who was said to possess a unique ability to turn any object he touched into gold. The term "castaneous" can be used in various contexts depending on the context in which it is used. For example: - In geometry, it refers to a point that divides a line segment into two equal parts