subfreezing en · ADJ
Etymology
Etymology tree Proto-Indo-European *upó Proto-Italic *supo Latin sub Latin sub-der. English sub- English freezing English subfreezing From sub- + freezing.
Meanings
-
(not-comparable) Colder than the freezing point of water; below zero degrees Celsius or 32 degrees Fahrenheit.
The arctic cold front brought subfreezing temperatures, snow, freezing rain and treacherous driving conditions.
A subfreezing December 1955 wind blows whistle steam past cab as J-5a 5439 with the Queen City yells for a Dayton (O.) crossing.
1959, Steam's Finest Hour, edited by David P. Morgan, Kalmbach Publishing Co., page 20 (photo caption)