Nursing Central is the award-winning, complete mobile solution for nurses and students. Look up information on diseases, tests, and procedures; then consult the database with 5,000+ drugs or refer to 65,000+ dictionary terms. Explore these free sample topics:
-- The first section of this topic is shown below --
[L. parere, to bring forth, bear]
1. One who begets or bears offspring; a father or a mother.
2. In radiation physics, a radioactive substance that decays into another nuclide.
3. The origin or source of something, as of a cell, a cell mass, a tissue, or a tissue fragment.