Bisectrix is a term commonly used in mathematics and refers to a line or plane that divides an angle or figure into two equal parts. There are various synonyms that are often used for this term such as the angle bisector, which is commonly used in geometry. Another synonym for bisectrix is median in statistics, which refers to a value that divides a set of observations into two equal halves. In trigonometry, the term midline can be used as a synonym for bisectrix. The term bisector is also commonly used in mathematics to refer to a line that divides a segment or shape into two equal parts.