Min. Also eukairite. [f. Gr. εὔκαιρ-ος well-timed, opportune (f. εὐ- EU- + καιρός time, season) + -ITE: see quot.] A mineral, consisting principally of selenium, copper and silver.
1822. Cleaveland, Min., 539. Eukairite … was discovered about the time Berzelius completed his examination of the new metal Selenium.
1844. Dana, Min., 487. Eucairite.
