sta·lag·mite /stəˈlægˌmaɪt ||ˈstæləg-/
石筍
Sta·lag·mite n. Geol. A deposit more or less resembling an inverted stalactite, formed by calcareous water dropping on the floors of caverns; hence, a similar deposit of other material.
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stalagmite
n : a cylinder of calcium carbonate projecting upward from the
floor of a limestone cave