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.
The sneeze is accomplished by biochemical signals that regulate the beating of cilia (microscopic hairs) on the cells that line our nasal cavities. Cold and flu season may be winding down, but sneezing -- with allergies surely on the way -- is here to stay. We all do it, though some of us are more disruptively loud than others. It's a reflex we simply can't control.