Source : Webster's Revised Unabridged Dictionary (1913)

   {Capital letter} [F, lettre capitale] (Print.), a leading or
      heading letter, used at the beginning of a sentence and as
      the first letter of certain words, distinguished, for the
      most part, both by different form and larger size, from
      the small (lower-case) letters, which form the greater
      part of common print or writing.

   {Small capital letters} have the form of capital letters and
      height of the body of the lower-case letters.

   {Capital stock}, money, property, or stock invested in any
      business, or the enterprise of any corporation or
      institution. --Abbott.

   Syn: Chief; leading; controlling; prominent.

Source : WordNet®

capital stock
     n 1: the maximum number of shares authorized under the terms of a
          corporation's articles of incorporation [syn: {authorized
          shares}, {authorized stock}]
     2: the book value of the outstanding shares of a corporation