Tabasheer (Hindustani: तबाशीर or طباشیر) or Banslochan (बंसलोचन, بنسلوچن), also spelt as Tabachir or Tabashir, is a translucent white substance, composed mainly of silica and water with traces of lime and potash, obtained from the nodal joints of some species of bamboo. It is part of the pharmacology of the traditional Ayurveda and unani systems of medicine of the Indian subcontinent. It is also an ingredient in many traditional Chinese medicines.
Tabasheer is claimed to provide a variety of health benefits. It is variously regarded as an antipyretic, antispasmodic, antiparalytic, restorative and aphrodisiac.