STALAGMITE

n. cone-shaped mineral deposit on the floor of a cave (often beneath a stalactite)

Stalagmites may also refer to a type of fungus A stalagmite (from the Greek stalagma ("Σταλαγμίτης"), "drop" or "drip") is a type of  speleothem that rises from the floor of a limestone cave due to the dripping of mineralized solutions and the deposition of calcium carbonate. The corresponding formation on the ceiling of a cave is known as a stalactite. If these formations grow together, meeting in the middle, the result is known as a column.
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Noun
1. a cylinder of calcium carbonate projecting upward from the floor of a limestone cave
(hypernym) cylinder
(part-holonym) cave
(substance-meronym) dripstone

n. stalagmite, cone-shaped lime deposit on the floor of a cave (often beneath a stalactite)

n. stalagmite, cone-shaped mineral deposit on the floor of a cave (often beneath a stalactite)