heterogeneous

1. (mathematics) Incommensurable because of different kinds.

2. (physics, chemistry) Having more than one phase (solid, liquid, gas) present in a system or process.

3. (chemistry) Visibly consisting of different components.

4. (computing) Of a network comprising different types of computers, potentially with vastly differing memory sizes, processing power and even basic underlying architecture; alternatively, of a data resource with multiple types of formats.