(From the Greek isos, "equal" + -tropos, "turning") Having physical properties, as conductivity, elasticity, etc., that are the same regardless of the direction of measurement. For example, metals are isotropic, because their physical properties, such as conductivity and tensile strength, are the same throughout. A liquid is isotropic, but a crystalline solid is not, as it has crystal axes.
Compare:
anisotropic