Pronunciation: (en),[key] —n., —pl.N's or Ns, n's or ns. 1. the 14th letter of the English alphabet, a consonant.
2. any spoken sound represented by the letter N or n, as in now, dinner, son, etc.
3. something having the shape of an N. 4. a written or printed representation of the letter N or n. 5. a device, as a printer's type, for reproducing the letter N or n.
Pronunciation: (un),[key] —conj.Pron. Spelling. and: Stop 'n save. Look 'n listen.Also,'n'.
—Symbol. 1. the 14th in order or in a series, or, when I is omitted, the 13th.
2. (sometimes l.c.) the medieval Roman numeral for 90. Cf. Roman numerals. 3. Chem.nitrogen.
5. Math.an indefinite, constant whole number, esp. the degree of a quantic or an equation, or the order of a curve.
8. Chem.See Avogadro's number. 9. See neutron number.
—Symbol. 1. Physics.neutron.
2. Optics.See index of refraction.
Chem. an abbreviated form of normal, used in the names of hydrocarbon compounds that have a normal or straight chain of carbon atoms: n-3 fatty acid.