sub-zero

[ suhb-zeer-oh ]
/ sʌbˈzɪər oʊ /

adjective

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.

Origin of sub-zero

Example sentences from the Web for subzero

British Dictionary definitions for subzero

subzero
/ (sʌbˈzɪərəʊ) /

adjective

(esp of temperature) lower or less than zero