Definition of "biaxial" in English

adjective

1. Having two axes.

2. (mathematics, astronomy) Having two axes of rotation and two planes of symmetry (e.g. having the shape of a spheroid)

3. Along two axes; e.g. in engineering, a shear or compression text of a material along two axes

   • mapping the shape of the Earth onto a biaxial ellipsoid

4. Having a value in two perpendicular directions. (In solid mechanics, it generally means that normal stresses exist in two of the possible three directions, though not necessarily equal in sign or magnitude.)