A paronychia is an infection of the skin that surrounds a toenail or fingernail. Acute paronychia â This usually appears as a sudden, very painful area of swelling, warmth and redness around a fingernail or toenail, usually after an injury to the area.
Definition of 'reflector'. reflector (rÉªflektÉÊ³ ) A reflector is a small piece of specially patterned glass or plastic which is fitted to the back of a bicycle or car or to a post beside the road, and which glows when light shines on it. A reflector is a type of telescope which uses a mirror that is shaped like a ball.
Later it came to be known as the Gregorian telescope. The credit for the first reflector telescope goes to the great Isaac Newton. He built the first reflector telescope in 1668 which later became known as the Newtonian telescope. The Newtonian reflector is the most famous type of telescope among amateur, and most of the professional astronomers.