(n)the capital and chief port and largest city of Libya; in northwestern Libya on the Mediterranean Sea; founded by the Phoenicians in the 7th century BC, Syn.Tarabulus Al-Gharb, capital of Libya
n. (Min.) An earthy substance originally brought from Tripoli, used in polishing stones and metals. It consists almost wholly of the siliceous shells of diatoms. [ 1913 Webster ]