I.pertaining to Alcyone or alcyon (v. alcedo).
a. Alcyonei dies = alcedonia (q. v.), Col. 11, 2.—
b. Alcyoneum medicamen, or absol.: alcyŏnēum , i, n., or even alcyŏnĭum . sea-foam, used as a remedy for spots on the face: “alcyoneo utuntur ad oculorum cicatrices,” Plin. 32, 8, 27, § 86; cf. Cels. 5, 6, 18, n. 26.