n. 石笋

[ noun ]
a cylinder of calcium carbonate projecting upward from the floor of a limestone cave
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Stalagmite \Sta*lag"mite\ (st[.a]*l[a^]g"m[imac]t), n. [Gr.
sta`lagma that which drops, a drop, fr. stala`zein to drop:
cf. F. stalagmite.] (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.