The meaning of the Acronym IRB is...

IRB is

• International Republican Brotherhood

More Meanings For IRB:

• Internal Revenue Bulletin
• Internal Ratings Based
• Institutional Review Board
• Independent Reading Book
• International Rugby Board
• International Republican Brotherhood
• Investigational Review Board
• Institutional Review Board
• Improved Ribbon Bridge
• Incident Report Book
• Interface Requirements Board
• Internal Review Board
• I Ref Badly
• Institutional Review Board (approves research protocols at hospitals)
• International Rubbish Bullshit

IRB is also in:

• Accounting
• Adults
• Chat
• Educational
• FDA
• General
• Military
• Physiology
• Police
• Sports
• Unions
• US Government