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Central Bank's Terms

Repo Rate/Repurchase Rate (RT) -

It is the rate at which bank borrows funds from RBI with the help of securities to meet demand they are facing for loans.
It injects liquidity in economy

Reverse Repo Rate/Repurchase Rate (RRT) -

It is the rate at which RBI borrows fund from Bank to reduce money floating in banking system.
It absorbs liquidity from economy.

Cash Reserve Ratio (CRR) -

It refers to amount of deposits banks have to maintain in RBI.

Statutory Liquidity Ratio (SLR) -

It refer to amount that banks require to maintain in form of GOLD or goverment approved securities(bond/shares).
RBI always determines the percentage of SLR.

Bank Rate (BR) -

It is rate of interest at which RBI lends money to banks.

Call Rate/Overnight Rate (Cl/OR) -

It rate at which bank lends or borrows money from each other for daily basis or short-term requirment in overnight market.

Source-

http://flame.org.in/KnowledgeCenter/WhatisCRRrepoandreversereporate.aspx

http://iasmentor.wordpress.com/2008/02/11/repo-reverse-repo-bank-rate-call-rate-crr-slr-definitions/

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