Meaning of airstone | Babel Free
Definitions
A piece of aquarium furniture, traditionally limewood or porous stone, whose purpose is to diffuse oxygen gradually into the tank, eliminating the noise and large bubbles of conventional air filtration systems.
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.