stalagmite
Concise Oxford English Dictionary © 2008 Oxford University Press:
stalagmite /ˈstaləgmʌɪt/
▶noun a mound or tapering column rising from the floor of a cave, formed of calcium salts deposited by dripping water.
– derivatives
stalagmitic adjective.
stalagmitic adjective.
– origin C17: from mod. L. stalagmites, from Gk stalagma ‘a drop’, based on stalassein (see stalactite).
'stalagmite' also found in these Oxford entries:

