homogeneous
the material has the same composition at every point
isotropic
the properties are the same in all directions
source
transversely isotropic
the properties in a particular direction are the same throughout the material and the properties in all directions perpendicular to that direction are the same
orthotropic
there are at least 2 orthogonal planes of symmetry, where material properties are independent of direction within each plane
anisotropic
the properties differ in all directions
taken by Mike Crites, Jose Soto, & Jeff Thomas, October 1997