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.
Some prescription medications also cause thirst. Frequent excessive thirst and/or thirst that wonât be quenched can be symptoms of serious medical conditions, such as: 1  dehydration: Dehydration occurs when you lack the proper amount of fluids for your body to function properly.2  Severe dehydration is life threatening, especially for infants and young children.auses of Excessive Thirst. It is normal to feel thirsty after eating salty or spicy foods, or after engaging in strenuous exercise or sporting events, especially when it is hot. You may also feel thirsty when you suffer from diarrhea, vomiting, burns, or a significant loss of blood.