プログレッシブ和英中辞典(第4版)の解説
ひょうてん【氷点】
the freezing point;〔物理学で〕the ice point
氷点下の気温
a below-zero [sub-zero] temperature(▼摂氏の場合のみ)/a temperature below the freezing point
温度は氷点下3度に達した
The temperature dropped [sank] to -3°C.(▼minus three degrees Celsius [centigrade]と読む)/The mercury dropped to 3° below 「the freezing point [freezing].
温度は氷点以上に上がった[氷点下に下がった]
The temperature 「rose above [fell below/dropped below] the freezing point.