cave diving
noun
The exploration of underwater cave systems, especially as a recreation, using specialized diving equipment.
Origin
1940s.
- armory
- armour
- armoured
- armoured car
- armoured personnel carrier
- armourer
- Armour, Philip Danforth
- armour plate
- armour-plated
- armoury
- armpit
- armrest
- arms
- arms control
- arm's-length
- arms race
- Armstrong, Edwin Howard
- Armstrong, Lance
- Armstrong, Louis
- Armstrong, Neil
- arm-twist
- arm-twisting
- arm-wrestle
- arm-wrestling
- army