‖n. [ NL. ] (Bot.) A genus of American shrubs containing several species, called snowdrop trees, or silver-bell trees. They have showy, white flowers, drooping on slender pedicels. [ 1913 Webster ]
a. [ L. Megalesius, fr. Gr. Mega`lh the Great, a surname of Cybele, the Magna Mater. ] Pertaining to, or in honor of, Cybele; as, the Megalesian games at Rome. [ 1913 Webster ]