rock floor
noun
1A stony lower surface of a room or other structure.
2A layer of underlying solid rock, bedrock.
Origin
Early 19th century; earliest use found in The Gentleman's Magazine.
- portable
- portable classroom
- portable gas
- portable media player
- portableness
- portable pension
- portably
- portacaval
- port admiral
- portage
- portage bill
- portage duty
- portage money
- portage strap
- porta hepatis
- portainer
- Portakabin
- portal
- portal canal
- portal circulation
- portal crane
- portal fissure
- portal frame
- portalled
- Portaloo