rock froth
noun
Molten or solidified lava that has expanded or that is low in density due to the presence of internal bubbles of steam or gas.
Origin
Late 19th century.
- porcupine crab
- porcupine disease
- porcupine fish
- porcupine grass
- porcupine-like
- porcupine man
- Porcupine River
- porcupine roller
- porcupine skin
- porcupine wood
- porcupinish
- porcupiny
- pore
- pore area
- pore-like
- porencephalia
- porencephalic
- porencephalous
- porencephalus
- porencephaly
- pore pressure
- porer
- pore rhomb
- porewater
- porey