You can run, but you can't hide when it comes to bacteria. They can be found everywhere on earth, from Antarctica to the inside of your intestines! Some are good, aiding digestion and giving us tasty food like cheeses and yogurt. Many are harmful, causing serious diseases; these are called pathogenic bacteria.hey are often able to cure once-fatal diseases, such as the bacterial infection scarlet fever. Amoxicillin, penicillin, and erythromycin are common antibiotics that inhibit bacterial cell functions. Antibiotics are derived primarily from bacteria or fungi (mold), such as Penicillium.
Full Definition of OPTICS. : a science that deals with the genesis and propagation of light, the changes that it undergoes and produces, and other phenomena closely associated with it.ADVERTISEMENT.. : a science that deals with the genesis and propagation of light, the changes that it undergoes and produces, and other phenomena closely associated with it.
Noun. 1. optic-the organ of sight. eye, oculus. sense organ, sensory receptor, receptor-an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation. visual system-the sensory system for vision.f or relating to the eye or vision. 2. Of or relating to the science of optics or optical equipment. n. 1. An eye. 2. Any of the lenses, prisms, or mirrors of an optical instrument.