multivalve

1. Having or involving multiple valves (in any context); thus:
   1. not comparableinternal combustion enginesHaving multiple intake valves and multiple exhaust valves per cylinder (typically two of each instead of one of each).
   2. not comparableanatomyHaving multiple biological valves.

      a multivalve mollusk

   3. not comparableanatomyInvolving multiple heart valves.

      multivalve heart disease

plural multivalves

1. biologyA multivalve mollusc.