石せき筍じゅんせきじゅんMeanings1nounstalagmitegeologyGeological term for a mineral formation that rises from the floor of a cave, often paired with 鍾乳石 (stalactite).See also: 鍾乳石洞どう窟くつの奥おくには巨きょ大だいな石せき筍じゅんがそびえていた。A huge stalagmite towered deep inside the cave.