1.
stalactite; stalagmite; dripstone
A mineral deposit formed by dripping water in caves, typically made of calcium carbonate. The term covers both formations hanging from the ceiling (stalactites) and those rising from the floor (stalagmites).
A compound of 鍾乳 (stalactite formation) and 石 (stone). Formed over millennia as water containing dissolved calcium carbonate drips through limestone caves and gradually deposits mineral layers.
In everyday Japanese, 鍾乳石 is used as a general term for both stalactites (hanging from above) and stalagmites (growing from below). Visiting 鍾乳洞 (limestone caves) is a popular tourist activity in Japan.