noun, noun which may take the genitive case particle 'no'
below zero; sub-zero
Used for temperatures below freezing (0°C). Commonly appears in weather forecasts and news.
明日の朝は零下5度まで下がるでしょう。
Tomorrow morning the temperature will drop to minus 5 degrees.
零下の気温でも、子どもたちは外で
Even in sub-zero temperatures, the children were playing outside.