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Medical Dictionary with highly standardised medical terminology

Search the most up to date and comprehensive medical dictionary and learn about various medical terminology drugs and other medical equipment.

All Terms

N-methyl-d-aspartame receptor - a molecule on the surface of a brain cell that admits calcium when activated by the chemical messenger glutamate.

Nanograms per milliliter - a small quantity of a substance; equivalent to one-billionth of a gram (454 grams make 1 pound) in one-thousandth of a liter (1 liter is approximately 1 quart). Abbreviated as ng/ml.

Narcolepsy - a sleep disorder that causes extreme sleepiness and uncontrollable sleep attacks, making a person fall asleep at inappropriate times during the day.

Nasolabial folds - lines in the skin leading from the nose to the outer corners of the mouth. Also known as smile or laugh lines.

Natural killer cells - a type of white blood cell of the immune system. These cells destroy other cells that fail to display the right chemical flags signaling that they are normal cells.

Natural recoverers - people who overcome addiction without treatment or formal self-help programs.

Nebulizer - a device that converts a liquid meicine into a mist that can be breathed in.

Necrosis - the premature death of living cells or tissues.

Needle biopsy - use of a hollow needle to remove a small sample of tissue for examination.

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