Nn. the 14th letter of the Roman alphabet Nn. (of a solution) concentration expressed in gram equivalents of solute per liter Nn. a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram; equal to 100,000 dynes Nn. the cardinal compass point that is at 0 or 360 degrees Nn. a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues N'Djamenan. the capital and largest city of Chad; located in the southwestern on the Shari river n-thadj. last or greatest in an indefinitely large series n-type semiconductorn. a semiconductor in which electrical conduction is due chiefly to the movement of electrons N. Y. Stock Exchangen. a stock exchange in New York N.B.n. a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something N.C.n. a state in southeastern United States; one of the original 13 colonies N.D.n. a state of north central United States bordering on Canada N.H.n. a state in New England; one of the original 13 colonies N.J.n. a Mid-Atlantic state on the Atlantic; one of the original 13 colonies N.M.n. a state in southwestern United States on the Mexican border