Green tea contains 2% to 4% caffeine which affects thinking and alertness, increases urine output, and may improve the function of brain messengers important in Parkinson's disease. It also contains antioxidants and other substances that might help protect the heart and blood vessels. Green tea is safe for most adults. Green tea extract seems to be safe for most people for short-term use. In some people, green tea can cause stomach upset and constipation. Green tea extracts have been reported to cause liver problems. Too much green tea, such as more than five cups per day, can cause side effects because of the caffeine.
Bore (engine) The Bore or cylinder bore is a part of a piston engine. The bore also represents the size, in terms of diameter, of the cylinder in which a piston travels. The value of a cylinders bore, and stroke, is used to establish the displacement of an engine. The term bore can also be applied to the bore of a locomotive cylinder or steam engine pistons.
Freebase(0.00 / 0 votes)Rate this definition: Boresight. Boresight is the adjustments made to an optical firearm sight or iron sights, to align the firearm barrel and sights. This method is usually used to pre-align the sights, which makes zeroing much faster.