N
WordNet
noun
(1) The 14th letter of the Roman alphabet
(2) (of a solution) concentration expressed in gram equivalents of solute per liter
(3) 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
(4) The cardinal compass point that is at 0 or 360 degrees
(5) 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