Question

what is an anisotropic solid ???

Answer 1

When you measure properties of materials from different “angles” (read: point of view in the sense of crystal structures),and you get a different set of information ,that material (solid) is said to be anisotropic.

A counter part of these solids exist too! They are called isotropic solids. They always give you the same result of any property measured from any point of view.
hope it helps

Answer 2

Answer:

crstalline solid are anisotropic