Osmolarity
The concentration of osmotically active particles in solution, which may be quantitatively expressed in osmoles of solute per liter of solution.
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- Osmolar
In biochemistry, referring to the osmolarity, the concentration of osmotically active particles in solution, which may be quantitatively expressed in osmoles of solute per liter of solution.
- p.c.
Abbreviation meaning after meals (from the Latin “post cibum”, after meals).
- p.o.
Abbreviation meaning by mouth, orally (from the Latin “per os”, by mouth).
- p.r.n.
Abbreviation meaning “when necessary” (from the Latin “pro re nata”, for an occasion that has arisen, as circumstances require, as needed).
- p53
A specific protein with a mass of 53 kilodaltons that is produced by a tumor-suppressor gene. Like other tumor-suppressor genes, the p53 gene normally controls cell growth. If p53 is physically lost or functionally inactivated, cells can grow without restraint. Many human tumors have mutations in the gene coding for the p53 protein.