Nadi
Pulse and any tube shaped organ such as vein or artery.

Nadis
Very fine channels of the body.

Nadi Svedana
Localized, acute steam administered specifically to the joints and spinal area during Purvakarma procedure. 

Naimittika
A cause that helps to achieve a specific result.

Nanatmaja
A result (disease) caused by single factor (dosa).

Nasya
The therapeutic cleansing of the head and neck region. Herbal medication of nasal in which the excess bodily humors that accumulate in the sinus, throat, nose or head is eliminated by the means of the nearest possible opening, the nose.

Neem
A well known herb commonly known as Margosa tree or Azadirachta indica in Latin.

Netra Basti
An external, localized application of medicated ghee around the eyes to nourish the eyes, reduce eye strain and improve vision.

Netra
Eye.

Nidana
Finding the cause of disease.

Nidra
Sleep.

Nija
Innate, one's own, internal, natural, inherent.

Nirooha Basti
A large, herbal decoction administered into the colon to remove toxins and wastes from the body.

Niruha (Basti)
An enema that is not of an oily kind.

Niyama
Literally means regulation. Restrain, to fix upon, control, check.