Sentence:  The island of Scio is now called by the Greeks Kio [Χιο], the antient Greek name of it was Chios [Χιος]; it was first called Ætalia in very antient times, and also Mastic, on account of the great number of <WSD>mastic</WSD> trees that were in this island. 
Meaning of the word marked with <WSD> tags:  An evergreen shrub or small tree, "Pistacia lentiscus" ((mastic tree)), native to the Mediterranean.