stalagmite (n.)

cone-shaped formation of carbonate of lime on the floor of a cave, 1680s, from Modern Latin stalagmites (1650s, Olaus Wormius), from Greek stalagmos "a dropping," or stalagma "a drop, drip, that which drops," from stalassein "to trickle" (see stalactite). Related: Stalagmitic; stalagmitical.