What is the definition or description of: pink eye?

Pink Eye: Most "pink eye" is caused by a viral infection on the inner part of the eyelid and thin moist "skin"covering the eyeball-called the conjunctiva. Once infected its called "conjunctivitis." you infect your eye when you touch a surface (or person) with the virus and rub your eye-transfering the virus. Frequent hand washing helps prevent this. Sharing towels or pillows can also cause infection.

Pink eye: Inflammation of a layer called the conjunctiva is referred to as "pink eye" in layman's term.