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.
