Nadir
The lowest point. The nadir may refer, for example, to the lowest blood count after chemotherapy or the lowest concentration of a drug in the body.
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- Na (sodium)
Na is the chemical symbol for sodium. From natrium, a synonym for sodium. Sodium is the major positive ion (cation) in fluid outside of cells. The chemical notation for sodium is Na+. When combined with chloride (Cl), the resulting substance is table salt (NaCl). Excess sodium (such as from fast food hamburger and fries) is […]
- n-Hexane
Teach children and teenagers the dangers of inhaling products that contain n-hexane. Keep products containing n-hexane (quick-drying glues and cements) out of the reach of children. Maintain proper ventilation when using these products. Never store household chemicals in containers, such as old soda bottles, that children might find attractive. If a person has been exposed […]
- NEJM
The New England Journal of Medicine.
- Neo- (prefix)
Prefix meaning new. From the Greek “neos”, new, young, fresh, recent. Examples of terms starting with “neo-” include neonatal and neonate (the newborn), neoplasia and neoplasm (new growth = tumor), etc. The opposite of neo- is paleo-. Although paleo- does enter occasionally into medical usage, it is far less commonly encountered than neo- in medicine […]
- Neocortex
The newer portion of the cerebral cortex that serves as the center of higher mental functions for humans. The neocortex contains some 100 billion cells, each with 1,000 to 10,000 synapses (connections), and has roughly 100 million meters of wiring, all packed into a structure the size and thickness of a formal dinner napkin. The […]