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

• nattiness
• natty
• natural
• natural ability
• natural action
• natural childbirth
• natural covering
• natural depression
• natural elevation
• natural enclosure
• natural endowment
• natural event
• natural family planning
• natural fiber
• natural fibre
• natural gas
• natural glass
• natural history
• natural immunity
• natural language
• natural language processing
• natural language processing application
• natural language processor
• natural law
• natural logarithm