Bisymmetric is a term that refers to a system or object which has two planes of symmetry. Synonyms for the word include bilateral, symmetrical, and mirror-image. Another synonym is "dihedral," which describes an object with two similar halves that are mirror images of each other. Bisymmetric is also often used in mathematics, where it is used to describe shapes or figures that can be divided into two equal parts. Other synonyms for bisymmetric in the mathematical context include equilateral, congruent, and isosceles, which describe shapes that have equal sides or angles. Overall, bisymmetric is an important term with many synonyms that are essential to understanding symmetry in different contexts.