by HowStuffWorks.com Contributors Home & Garden | Construction Planning. NEXT PAGENEXT. 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.
Definition of rash - acting or done without careful consideration of the possible consequences; impetuous Definition of rash - acting or done without careful consideration of the possible consequences; impetuous
The word  rash  means a change in the color and texture of skin that usually causes an outbreak of red patches or bumps on the skin. In common usage of the term, a rash can refer to many different skin conditions. A rash can be caused, directly or indirectly, by a bacterial, viral, or fungal infection.