👉 The term "curvilinead" is a term used in mathematics to describe a curve or surface that can be described by an infinite series of linear functions. This type of curve is often called a "curvilinear" curve, as it has both linear and non-linear components. In the context of geometry, a curvilinear curve is commonly used to represent the shape of a curved line or path in three-dimensional space. It allows for the calculation of various geometric quantities such as distances,