Mastic Definition
 măstĭk 
    noun
  
 The tree.
 Webster's New World 
A yellowish resin obtained from a small Mediterranean evergreen tree (Pistacia lentiscus) of the cashew family, used as an astringent and in making varnish, adhesives, etc.
 Webster's New World 
A pastelike cement used in highway construction, especially one made with powdered lime or brick and tar.
 American Heritage 
Any of various pasty substances used as adhesives, sealants, etc.
 Webster's New World 
Synonyms: 
  
- Pistacia lentiscus
- lentisk
- mastic tree
Other Word Forms of Mastic
Noun
Singular:
 masticPlural:
 masticsOrigin of Mastic
- Middle English mastic resin from Old French mastich from Latin mastichum, mastichē from Greek mastikhē chewing gum, mastic from mastikhān to grind the teeth - From American Heritage Dictionary of the English Language, 5th Edition 
-  Latin mastiche, from Ancient Greek μαστίχη (mastikhÄ“), from μαστιχάω (mastikhaō, “I chew") (note the chewing gum sense). From Wiktionary 
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