a peninsula of N central Greece, in Macedonia Central, ending in the three promontories of Kassandra, Sithonia, and Akti. Area: 2945 sq km (1149 sq miles)
Modern Greek name: Khalkidíki
Chalcidice in American English
(kælˈsɪdəˌsi)
peninsula in NE Greece, extending into the Aegean, & terminating in three prongs