Where does “stalagmites” come from?

stalagmites (English) comes from English stalagmite, from New Latin stalagmites, from Ancient Greek στάλαγμα — drop.

stalagmites (English): plural of stalagmite

Definitions

Step	Language	Word	Meaning
1	English	stalagmite	A secondary mineral deposit of calcium carbonate...
2	New Latin	stalagmites	—
3	Ancient Greek	στάλαγμα	drop

stalagmites — Etymology, Origin & Word History | Etymology Explorer