a. [f. EPHEMER-ON + -OUS.] Having the nature of, or resembling, an ephemeron; transitory.
a. 1660. Hammond, 19 Serm., vi. Wks. 1684, IV. 597. Our ephemerous wishes, that no man can distinguish from true piety, but by their sudden death.
1790. Burke, Fr. Rev., 286. The ephemerous tale that does its business and dies in a day.
1872. Darwin, Orig. Spec., xiv. 386. A certain ephemerous insect (Chlöeon) during its development, moults above twenty times.