Skip to Content


Pronunciation: nor'mal


  1. Typical; usual; according to the rule or standard.
  2. In bacteriology, nonimmune; untreated; denoting an animal, or the serum or substance contained therein, that has not been experimentally or naturally immunized against a microorganism or its products.
  3. Denoting a solution containing 1 eq of replaceable hydrogen or hydroxyl per liter; 1 mol/L HCl is 1 n, but 1 mol/L H2SO4 is 2 n.
  4. In psychiatry and psychology, denoting a developmentally appropriate level of effective functioning of personality, cognition, and affect that is satisfactory both to people and to their respective social milieu.
  5. Referring to a straight line (or plane) at a right angle to another line (or plane).
  6. Not diseased or having been subjected to an experimental procedure.
  7. A molecular entity having an unbranched carbon chain; usually symbolized by n.

[L. normalis, according to pattern]

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.