speleothem
Defined in 1 dictionary — U.S. Code
United States Code
16 U.S.C. § 4302 — for purposes of this chapter
The term “speleothem” means any natural mineral formation or deposit occurring in a cave or lava tube, including but not limited to any stalactite, stalagmite, helictite, cave flower, flowstone, concretion, drapery, rimstone, or formation of clay or mud.