a. [f. EPHEMER-ON + -OUS.] Having the nature of, or resembling, an ephemeron; transitory.

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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.

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1790.  Burke, Fr. Rev., 286. The ephemerous tale that does its business and dies in a day.

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1872.  Darwin, Orig. Spec., xiv. 386. A certain ephemerous insect (Chlöeon) during its development, moults … above twenty times.

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