Mastic

n.
  1. (Bot.) A low shrubby tree of the genus Pistacia (Pistacia Lentiscus), growing upon the islands and coasts of the Mediterranean, and producing a valuable resin; -- called also, mastic tree.
  2. A resin exuding from the mastic tree, and obtained by incision. The best is in yellowish white, semitransparent tears, of a faint smell, and is used as an astringent and an aromatic, also as an ingredient in varnishes.
  3. A kind of cement composed of burnt clay, litharge, and linseed oil, used for plastering walls, etc.
    4. Barbary mastic (Bot.),
    the Pistachia Atlantica.
    Peruvian mastic tree (Bot.),
    a small tree (Schinus Molle) with peppery red berries; -- called also pepper tree.
    West Indian mastic (Bot.),
    a lofty tree (Bursera gummifera) full of gum resin in every part.