What does call money market mean?

call money market meaning in Law Dictionary

marketplace where agents and dealers borrow funds to meet their credit requirements, either to finance their particular inventory of securities or even to protect their clients' margin records.

call money market meaning in Business Dictionary

a form of market used primarily by agents and dealers of securities. The forex market can be used by they in funding the margin account of these customers in addition to to invest in the purchase of one's own securities.