Lapithæ (lap ´i-thē).—A mythical people inhabiting the mountains of Thessaly. They were ruled by Pirithous, who, as Ixion's son, was half-brother of the Centaurs. When Pirithous married Hippodamia, and invited the Centaurs to the marriage feast, the latter, fired by wine, attempted to carry off the bride and the other women. Hence arose the celebrated fight between the Centaurs and the Lapithæ, in which the former were defeated. The Lapithæ are said to have invented bits and bridles for horses.