Simple past tense and past participle of cool down.
Cooled-down Sentence Examples
I expect she cooled down after a while, but by that time he was long gone.
Having replaced the oxygen in the absorption vessels by air, they are disconnected and weighed, after having cooled down to the temperature of the room.
25, p. 613), but both modifications may exist in metastable forms at higher and lower temperatures respectively; the rhombic form may be cooled down to ordinary temperature without changing, the transformation, however, being readily induced by a trace of the red modification, or by friction.
But if the alloy is heated up to 580° C. it loses its susceptibility - rather suddenly when H is weak, more gradually when H is strong - and remains non-magnetizable till it is once more cooled down below the freezing-point.
The liquid metals, when cooled down sufficiently, some at lower, others at higher, temperatures freeze into compact solids, endowed with the (relative) non-transparency and the lustre of their liquids.