The phrase "are defined by different" is correct and usable in written English.
It can be used when discussing how various elements or concepts are characterized or distinguished from one another.
Example: "The parameters of the study are defined by different criteria that influence the outcomes."
Alternatives: "are characterized by various" or "are determined by distinct".
It should be noted that the crust and lithosphere are defined by different properties and do not constitute the same layer.
Gender relations are defined by different roles and responsibilities assigned by society to men and women (Ostlin et al. 2006).
Further verification revealed that the seven classes are defined by different combinations and levels of 10 proteins found in breast cancer cells.
Problems with the addressing space isolation mechanism were first discovered in the FITS testbed (Section 4.1), in which different virtual networks are defined by different VLAN ID tags.
The fact that social groups are defined by different criteria, and that persons commonly belong to more than one social group, might be taken as a reason to move from relativism to a form of subjectivism.
These flow processes occurring in different water bodies are here treated through an appropriate algorithm to model inlet/outlet boundary conditions which are defined by different sets of particles.
To Euler, who thought in terms of formulas, this meant that the shapes of the curves were defined by different formulas in different intervals.
When you are so connected to fellow LGBT individuals in your locations, an incident like this brings things into perspective: you are in a foreign nation, and your sexuality is defined by different standards.
The overall authorization policy may be defined by different entities, which may produce conflicting authorization decisions.
Asthma is a complex disease, and different childhood asthma phenotypes have already been defined by different immunological mechanisms [25].
In order to generate the speed reference trajectory which can be defined by different shapes and amplitudes of jerk, a unique generalized model is proposed.
