(n.) Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product.
Example Sentences:
(1) A mass survey and follow-up examinations to screen lung cancer victims at hunan realgar mine have been carried out over three years.
(2) Since 1984, mass screening for cancer has been carried out in the realgar and tin mines, high incidence areas of lung cancer.
Sandarac
Definition:
(n.) Realgar; red sulphide of arsenic.
(n.) A white or yellow resin obtained from a Barbary tree (Callitris quadrivalvis or Thuya articulata), and pulverized for pounce; -- probably so called from a resemblance to the mineral.
Example Sentences:
(1) According to standard procedures, after pulp extirpation, canals were temporarily filled with sandarac cotton pellets and left otherwise untreated for 4 weeks.
(2) The results suggested that sandarac varnishes containing high concentrations of chlorhexidine can be used successfully for long-term suppression of S. mutans in dental fissures.
(3) Sandarac, a natural resin, was used as the varnish base.