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 a painful swelling of the appendix, a finger-like pouch connected to the large intestine. Appendicitis typically starts with a pain in the middle of your abdomen (tummy) that may come and go. Within hours the pain travels to the lower right-hand side, where the appendix usually lies, and becomes constant and severe. Pressing on this area, coughing or walking, may all make the pain worse. You may lose your appetite, feel sick and occasionally experience diarrhoea.