Wiktionary
n. A hot spring.
WordNet
n. a natural spring of water at a temperature of 70 F or above [syn: hot spring]
Usage examples of "thermal spring".
Five drill shafts on the west side of the lava channel encountered the collapsed remains of a thermal spring which contained ice and pockets of liquid water in the ml.
Her eyes were as dull and opaque as the waters of the thermal spring.
The best source would have been a thermal spring, but this was an alien world with a very different geology, and she had seen no such spring here.
The water was hot, almost scalding, a thermal spring welling up out of the matrix, but Centaine felt no discomfort .
It became genuine, however, when Oroles admitted that the raven had pinpointed the thermal spring.
Five drill shafts on the west side of the laval channel (see map 1) encountered the collapsed remains of a thermal spring, which contained ice and pockets of liquid water in the ml.
That was the thermal spring in which we bathed, and in which I found the first diamond of the H'ani Mine.
The other horses scrambled down a steep, icy gully onto the glacier, where a small thermal spring steamed eerily, forming a cloud which all the others vanished into, leaving Brak and Faxi facing Skarnhrafn across a small ravine.