BDC style reticles can look very different from one scope to the next. The reticle on the left is from a Bushnell 1-4x24mm AR optic and the reticle on the right is a Bushnell proprietary âDOA 600â reticle from one of their 3-9x optics.
Freebase(0.00 / 0 votes)Rate this definition: Thirst is the craving for fluids, resulting in the basic instinct of animals to drink. It is an essential mechanism involved in fluid balance. It arises from a lack of fluids or an increase in the concentration of certain osmolites, such as salt.
Excessive thirst, also known as polydipsia, is a relatively common medical condition that can be brought on by several different factors. These include changes in diet and exercise, mental illness, diabetes, and various other chronic diseases.ncreased thirst is also frequently caused by unhealthy blood sugar levels and may be an early warning sign of diabetes. For this reason, excessive thirst may be a cause for concern if it cannot be explained by the more common causes listed above.