Stalactite, a cone of carbonate of lime attached like an icicle to the roof of a cavern, and formed by the dripping of water charged with the carbonate from the rock above; Stalagmite being the name given to the cone formed on the floor by the dripping from a stalactite above.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Stair, John Dalrymple, 2nd Earl of * Stalybridge