Researchers do not know exactly what causes prostate cancer. But they have found some risk factors and are trying to learn just how these factors cause prostate cells to become cancer. On a basic level, prostate cancer is caused by changes in the DNA of a normal prostate cell. DNA is the chemical in our cells that makes up our genes. Our genes control how our cells function.
Barn definition, a building for storing hay, grain, etc., and often for housing livestock. See more.
A red barn in the snow. A red barn in the snow. The definition of a barn is a building separate from a main house, traditionally used for storing farm animals, equipment, or grain. A place where chickens live and hay is stacked up is an example of a barn. A large farm building used for storing farm products and sheltering livestock. 2  A large shed for the housing of vehicles, such as railroad cars. 3  A particularly large, typically bare building: lived in a barn of a country house. 4  Abbr.