stalactite

Noun
  1. A cylinder of calcium carbonate hanging from the roof of a limestone cave (synset 109466657)
    is a type of: cylinder - a surface generated by rotating a parallel line around a fixed line
    is a part of: cave - a geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea
    substance holonym: dripstone - the form of calcium carbonate found in stalactites and stalagmites

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