1. An acronym or abbreviation so old or familiar that few remember what its letters stand for, such as radar or BASIC (anachronistic + acronym)

Encyclopedia: Anacronym

• brown thrush
• brown trout
• Brown University
• brown-bag
• brown-black
• brown-gray
• brown-green
• brown-grey
• brown-haired
• brown-nose
• brown-purple
• brown-speckled
• brown-striped
• brown-tail moth
• Browne
• browned
• browned off
• brownfield
• Brownian motion
• Brownian movement
• brownie
• brownie mix
• Brownie point
• browning
• Browning automatic rifle