The classic case is ketchup which will not come out of the bottle until you stress it by shaking.There are also fluids whose strain rate is a function of time. Fluids that require a gradually increasing shear stress to maintain a constant strain rate are referred to as rheopectic.
acute appendicitis. See APPENDICITIS. aÂ·cute apÂ·penÂ·diÂ·ciÂ·tis. Inflammation of the appendix, usually resulting from bacterial infection, which may be precipitated by obstruction of the lumen by a fecalith; symptoms include periumbilical colicky pain, vomiting, among others.
Appendicitis is inflammation of the appendix. It may be acute or chronic. Harrisonâs Principles of Internal Medicine states that appendicitis is the most common medical emergency in the United States.ymptoms of appendicitis include: 1  lower right side abdominal pain. 2  loss of appetite. 3  nausea. 4  vomiting. 5  diarrhea. 6  constipation. 7  inability to pass gas. 8  abdominal swelling.