Cyănus
(
κύανος). A dark-blue substance supposed to be blue steel,
mentioned by Homer and Hesiod as forming a part of works of metal—e. g. on
Agamemnon's breastplate (
Il. xi. 24) and on the shield of Heracles (
Sc. Her.
143). The house of Alcinoüs had a cornice or frieze of
κύανος (
Od. vii. 87). In Theophrastus it is lapis lazuli (
Lapid.
31). See Merriam's note on
Od. vii. 87, in his
Phaeacians of Homer (N. Y.
1880).