What is a prototype? A prototype is a design tool used to help create a new product, much like a model. There are different kinds of prototypes; some are more like rough drafts and some are more like the final version. When you first come up with an idea for a new product, you'll probably sketch it out so you can show people what you're thinking of: This is one version of a prototype. But as time goes on, you'll want to make your drawing more detailed, especially if you're thinking about creating a complicated system.
Definition of sneeze. sneezed. ; sneezing. intransitive verb. : to make a sudden violent spasmodic audible expiration of breath through the nose and mouth especially as a reflex act.
Sneezing can occur for a variety of reasons that have in common an irritation of the lining (mucous membranes) of the nose or throat. It is rarely a sign of a serious illness. Many environmental triggers can lead to sneezing, including air pollutants, pollen, dry air, and dust. Spicy foods can sometimes cause sneezing. Allergies, colds, and the flu are common causes of sneezing. Drug withdrawal, emotions, and certain medications are less common causes of sneezing. Some people may sneeze as a reaction to exposure to bright light (known as a photic sneeze reflex).