- prefix nano- or x 10-9
- (written as N)Unusual type of galaxy with extremely bright core, related to Seyfert galaxies and quasars
- symbol for index of refraction, or refractive index.
- symbol forrefractivity (written as N)
- chemical symbol fornitrogen (written as N)
- symbol fornegative (written as N)
Cars & Driving
- symbol forneutral (written as N)
- symbol fornorthern (written as N)
- symbol foren dash
- noun a printed dash that is one en in length.
- noun a short dash like a hyphen, as long as an en, showing that two words or figures are joined together.