プログレッシブ和英中辞典(第4版)の解説
しょうかん【小寒】
the first half of the coldest period in midwinter (starting on the 15th day after the winter solstice)
日本語の解説|小寒とは
the first half of the coldest period in midwinter (starting on the 15th day after the winter solstice)