(1):

(n.) A low shrubby tree of the genus Pistacia (P. Lentiscus), growing upon the islands and coasts of the Mediterranean, and producing a valuable resin; - called also, mastic tree.

(2):

(n.) 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):

(n.) A kind of cement composed of burnt clay, litharge, and linseed oil, used for plastering walls, etc.