tabashir

(from the article `bamboo`) ...of bamboo are used as ornamentals in landscape gardens. The fine-grained silica produced in the joints of bamboo stems has been used as a medicine ...
Found on http://www.britannica.com/eb/a-z/t/1

Tabashir

Tabashir is a white, siliceous secretion found in the joints of certain bamboos and grasses. It is a herbal medicine used as a tonic and astringent. It can be fused into a transparent glass.
Found on http://www.probertencyclopaedia.com/browse/ET.HTM
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