New American Oxford Dictionary
Cassandra
Cas san dra |kəˈsandrə, -sän -kəˈsændrə |Greek Mythology a daughter of the Trojan king Priam, who was given the gift of prophecy by Apollo. When she cheated him, however, he turned this into a curse by causing her prophecies, though true, to be disbelieved. • (as noun a Cassandra ) a prophet of disaster, esp. one who is disregarded.
Oxford Dictionary
Cassandra
Cassandra |kəˈsandrə |Greek Mythology a daughter of the Trojan king Priam. She was given the gift of prophecy by Apollo, but when she cheated him, he turned this into a curse by causing her prophecies, though true, to be disbelieved. • (as noun a Cassandra ) a prophet of disaster, especially one who is disregarded.