| 单词 | concretion |
| 释义 | concretion n. 1. a a hard solid concreted mass. b the forming of this by coalescence. 2. Med. a stony mass formed within the body. 3. Geol. a small round mass of rock particles embedded in limestone or clay. Derivatives concretionary adj. Etymology: F f. L concretio (as concrete) |
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