Definition of a combinatorial circuit
On [#harris-harris-digital-design], page 57
A circuit is combinatorial if it has interconnected circuits that fit into the following three rules:
- All elements are combinatorial
- Every node is either an input or connects to exactly one output terminal
- The circuit contains no cyclic paths
[#harris-harris-digital-design]: Harris, David Money, and Sarah L. Harris. Digital Design and Computer Architecture. Second edition. Amsterdam: Elsevier, 2013.