- terra silicea purificata
- purified infusorial earth that has been boiled, washed, and calcined and is used in certain pharmaceutical operations.
Medical dictionary. 2011.
terra silicea purificata
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infusorial earth — a silicon rich earth composed mostly of fragments of diatoms; by boiling with dilute hydrochloric acid, washing, and calcining, it can be so purified as to be a very pure form of silica (terra silicea purificata). It is often mixed with clay and… … Medical dictionary
