concretionとは何ですか？
concretionとは何ですか？
- The act or process of concreting into a mass; coalescence.
- The state of having been concreted: a concretion of seminal ideas in her treatise.
- A solid hard mass.
- Geology A rounded mass of mineral matter found in sedimentary rock.
- Pathology A solid mass, usually composed of inorganic material, formed in a cavity or tissue of the body; a calculus.