sandarac

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A coniferous evergreen tree (Tetraclinis articulata) of Spain and northern Africa, having scalelike leaves and bark that yields a hard brittle translucent resin used in varnishes.
• noun The resin obtained from this tree.

from The Century Dictionary.

• noun In mineralogy, red sulphuret, or protosulphuret, of arsenic; realgar.
• noun A resin in white tears, more transparent than those of mastic, which exudes from the bark of the sandarac-tree, Callitris quadrivalvis. (See sandarac-tree.)

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

• noun mineralogy, archaic realgar; red sulphide of arsenic.
• noun botany, chemistry 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.
• noun Any tree from the genus Tetraclinis.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a brittle and faintly aromatic translucent resin used in varnishes
• noun durable fragrant wood; used in building (as in the roof of the cathedral at Cordova, Spain)
• noun large coniferous evergreen tree of North Africa and Spain having flattened branches and scalelike leaves yielding a hard fragrant wood; bark yields a resin used in varnishes