scolecite

from The Century Dictionary.

• noun One of the zeolite group of minerals, a hydrous silicate of aluminium and calcium, occurring in acicular crystals, also fibrous and radiated massive, commonly white. Early called lime-mesotype.
• noun In botany, the vermiform archicarp of the fungus Ascobolus, a name proposed by Tulasne. It is a structure composed of a chain of cells developed from the end of a branch of the mycelium.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Min.) A zeolitic mineral occuring in delicate radiating groups of white crystals. It is a hydrous silicate of alumina and lime. Called also lime mesotype.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun mineralogy A monoclinic-domatic mineral containing aluminum, calcium, hydrogen, oxygen, and silicon.