The Oils and Plants Aromatherapy Glossary gives definitions of Aromatherapy and Herbal Terms.

Here are the results for the letter n

Narcotic

n. 1. An addictive drug, such as opium, that reduces pain, alters mood and behavior, and usually induces sleep or stupor. Natural and synthetic narcotics are used in medicine to control pain. 2. A soothing, numbing agent or thing: "There was the blessed narcotic of bridge, at the Colony or at the home of friends" (Louis Auchincloss). adj. 1. Inducing sleep or stupor; causing narcosis. 2. Of or relating to narcotics, their effects, or their use. 3. Of, relating to, or intended for one addicted to a narcotic.

Natriuresis

Excretion of sodium by kidneys

Necrolysis

Gangrene

Neonatal

To do with the birth or care of new born babies.

Nephritis

Kidney inflammation

Nervine

An essential oil which strengthens the nervous system

Nervine

Strengthening or toning to the nerves and nervous system.