Invested money that, in contrast to debt capital, is not repaid to the investors in the normal course of business. It represents the risk capital staked by the owners through purchase of a company's common stock (ordinary shares).
The value of equity capital is computed by estimating the current market value of everything owned by the company from which the total of all liabilities is subtracted. On the balance sheet of the company, equity capital is listed as stockholders' equity or owners' equity. Also called equity financing or share capital.
Source: http://www.businessdictionary.com/definition/equity-capital.html