Definition of Rigor

1. Bad Bugs and Their Bites Slideshow
2. Heartburn: Foods to Eat and Avoid Slideshow
3. Understanding Multiple Sclerosis Slideshow

Rigor: A word with two different but related meanings in medicine:
1. A chill, usually with shivering, as at the onset of high fever and chills.

2. Rigidity, as in rigor mortis, the rigidity of a body after death.

The alternate spelling rigour is chiefly British. From the French, from the Latin rigor, meaning stiffness, from rigere, to be stiff.

Need help identifying pills and medications?
Use the pill finder tool on RxList.