WordNet (r) 3.0 (2006):

Chios
    n 1: an island in the Aegean Sea off the west coast of Turkey;
         belongs to Greece [syn: Chios, Khios]

Easton's 1897 Bible Dictionary:

Chios
   mentioned in Acts 20:15, an island in the Aegean Sea, about 5
   miles distant from the mainland, having a roadstead, in the
   shelter of which Paul and his companions anchored for a night
   when on his third missionary return journey. It is now called
   Scio.


Hitchcock's Bible Names Dictionary (late 1800's):

Chios, open; opening