E·phēm'e·ral1, a.
a. Any thing which lasts but a day, or a very short time; an ephemeral plant, insect, and the like.
2 entries under this word
Ephemeral
E-phēm'e-ral or E-phēm'e-rie or E-phēm'e-roüs2, a.
(123), E-phēm'e-roüs, a. [Gr. ἐφήμερος, and ἐφημέριος, on the day, for a day. See supra.]
Sense 1. Beginning and ending in a day; continuing or existing one day only; diurnal.
Sense 2. Short-lived; existing or continuing for a short time only.
To pronounce sentences not of ephemeral, but of eternal, efficacy. Sir J. Stephens.
The ephemerous tale that does its business and dies in a day. Burke.