stal ‧ ag ‧ mite /ˈstæləɡmaɪt $ stəˈlæɡmaɪt/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Language: Modern Latin ; Origin: stalagmites , from Greek stalagma 'drop' or stalagmos 'falling in drops' ]
a sharp pointed object coming up from the floor of a ↑ cave , formed by drops from a stalactite