concretions編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看concretionsconcretions — 名詞名詞1. Hard, compact masses formed by the accumulation of mineral matter.1.名詞釋義結核Hard, compact masses formed by the accumulation of mineral matter.例句The geologist studied the limestone concretions in the cave.