Definition
Biaxial means having two axes. In geometry, it refers to shapes or systems that are defined or measured along two axes, like a rectangle or a coordinate plane. Think of it as having two directions that are important. It is commonly used in physics, crystallography, and engineering to describe properties that vary along two axes. Biaxial stress, for instance, describes a situation where stress is applied in two directions. It's like saying something has two key measurements or perspectives.