intercurrent

Occurring at the same time as and usually altering the course of another disease.

Noting a pulse in which there is an occasional supernumerary beat.

Running between or among; occurring between; intervening.

Specifically, in pathology, occurring in a patient already suffering from some disease: said of a second disease.

Something that intervenes; an intercurrence; an incident.

Something intervening.

Running between or among; intervening.

Not belonging to any particular season.

Said of diseases occurring in the course of another disease.