Heated pool? (5)
I believe the answer is:
magma
(Other definitions for magma that I've seen before include "Hot material" , "Hot fluid rock" , "Hot molten rock" , "Glassy volcanic rock" , "Lava" .)
I believe the answer is:
magma
(Other definitions for magma that I've seen before include "Hot material" , "Hot fluid rock" , "Hot molten rock" , "Glassy volcanic rock" , "Lava" .)