👉 In mathematics, "armigeral" is a mathematical concept that refers to a line segment in two-dimensional Euclidean space. An armigeral can be defined as a straight line segment that passes through the midpoint of another line segment and has its endpoints on one side of the other. The term was first used by mathematician Carl Friedrich Gauss in his work "On the Summability of Series" (1801), where he described the concept of armigals for two-dimensional geometric