1. A range of mountains between France and Switzerland.
2. The Jurassic period. See Jurassic.
Island of the Inner Hebrides; area 380 sq km/147 sq mi; population (with Colonsay, 1981) 239. It is separated from Scotland by the Sound of Jura. The whirlpool Corryvreckan (Gaelic “Brecan’s cauldron”) is off the north coast.