Vision (Definition) Vision is a feature of a person's brain that allows him to see. He must have normal eyes, optic nerves (that stretch from the eyes to the back of his brain), and visual cortex (the vision center in the brain), in order to see properly. An ophthalmologist is a doctor specializing in vision. ...Read more.
The halogens or halogen elements (/ËhÃ¦lÉdÊÉn, ËheÉª-, -loÊ-, -ËdÊÉn/) are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The artificially created element 117 (ununseptium) may also be a halogen.
Synthetic cannabinoids are chemicals that are made to act like the active part of cannabis, a substance called tetrahydrocannabinol (THC). As synthetic cannabinoids act like cannabis the effects-good and bad-are likely to be very similar to cannabis.ynthetic cannabinoids are chemicals that are made to act like the active part of cannabis, a substance called tetrahydrocannabinol (THC). As synthetic cannabinoids act like cannabis the effects-good and bad-are likely to be very similar to cannabis.