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 (also called epityphlitis) is inflammation of the appendix. Appendicitis commonly presents with right iliac fossa abdominal pain, nausea, vomiting, and decreased appetite. However, one third to a half of persons do not have these typical signs and symptoms.ppendicitis is caused by a blockage of the hollow portion of the appendix, most commonly by a calcified stone made of feces. However, inflamed lymphoid tissue from a viral infection, parasites, gallstone or tumors may also cause the blockage.