Emily Dickinson Lexicon

MAS'TIC, or MAS'TICH, n. [Fr. mastic; It. mastice; D. mastik; Sp. almaciga; Port. almecega; Ir. maisteog; L. mastiche; Gr. μαστιχη.]

1. A resin exsuding from the mastic-tree, a species of Pistacia, and obtained by incision. It is in white farinaceous tears, of a faint smell, and is used as an astringent and an aromatic. It is used also as an ingredient in drying varnishes. Fourcroy. Encyc.
2. A kind of mortar or cement. Addison.