sub-zero

[ suhb-zeer-oh ]

/ sʌbˈzɪər oʊ /

indicating or recording lower than zero on some scale, especially on the Fahrenheit scale: a week of sub-zero temperatures.

characterized by or appropriate for sub-zero temperatures: sub-zero climates; sub-zero clothing for the exploration.

Nearby words

We have since found that it can and does heat the entire house even at sub-zero temperatures.
If You're Going to Live in the Country|Thomas H. Ormsbee and Richmond Huntley
During the day the heat would boil eggs, and at night the sub-zero cold cracked great scales off the granite boulders.
Loot of the Void|Edwin K. Sloat
They were all bundled in heavy garments, for the temperature of Callisto, never high, frequently drops to sub-zero readings.
The Space Rover|Edwin K. Sloat
The sub-zero temperature of Meta's voice left no doubt as to what she wanted to do with her.
The Ethical Engineer|Henry Maxwell Dempsey

The Wing Commander stiffened and snorted like a Merlin backfiring on a sub-zero morning.
A Yankee Flier with the R.A.F.|Rutherford G. Montgomery