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septarium

/sep'teәriәm/

📖 中文释义

  1. n. [地]龟背石
📘 English Definition（英文释义）
  1. n. A flattened concretionary nodule, usually of limestone,
  2. intersected within by cracks which are often filled with calcite,
  3. barite, or other minerals.
S 字母词表