mastic \mas"tic\, n. f., fr. l. mastiche, mastichum, gr. ?, fr.
   ? to chew, because of its being used in the east for
   chewing. written also mastich.
   1913 webster
   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.
      1913 webster

   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.
      1913 webster

   3. a kind of cement composed of burnt clay, litharge, and
      linseed oil, used for plastering walls, etc.
      1913 webster

   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.
      1913 webster
see also:
mastich pistacia pistacia lentiscus mastic tree barbary mastic pistachia atlantica 
peruvian mastic tree schinus molle pepper tree west indian mastic bursera gummifera