Helictite

A helictite is a speleothem found in limestone caves that changes its axis from the vertical at one or more stages during its growth. They have a curving or angular form that looks as if they were grown in zero gravity. They are most likely the result of capillary forces acting on tiny water droplets, a force often strong enough at this scale to d...
Found on http://en.wikipedia.org/wiki/Helictite

helictite

(from the article `cave`) ...growth of crystals is not interrupted, and some speleothems have shapes controlled by the forces of crystal growth rather than by the constraints ...
Found on http://www.britannica.com/eb/a-z/h/33

helictite

An irregular, gravity-defying speleothem with eccentric form (usually composed of calcite or aragonite), which at one or more stages of its growth changes its axis from the vertical to give a curving or angular form.
Found on http://www.cancaver.ca/docs/glossary.htm

helictite

twisted; branching stalactite
Found on http://phrontistery.info/h.html
No exact match found