Lewis & Short

alcēdo (halc-), ĭnis, lateralcyon (halc-), ĭnis, f., = ἀλκυών [O. H. Germ. alacra; the forms halcedo, halcyon arose from a fancied connection with ἅλς = the sea], the kingfisher, halcyon: Alcedo hispida, Linn.: Alcedo dicebatur ab antiquis pro alcyone, Paul. ex Fest. p. 7 Müll.: haec avis nunc Graece dicitur ἁλκυών, a nostris halcedo; sed hieme quod pullos dicitur tranquillo mari facere, eos dies halcyonios appellant (Gr. ἁλκυονίδες ἡμέραι, Aristoph. Av. 1594 Bergk), halcyon-days, Varr. L. L. 7, § 88 Müll.; Plaut. Poen. 1, 2, 142; cf. Plin. 10, 32, 47.