[ad. mod.L. Ephēmeridæ, f. ephēmera.] An insect belonging to the group Ephemeridæ: see EPHEMERA2. Also fig.
1872. H. A. Nicholson, Palæont., 186. The Haplophlebium Barnesii must have attained a size much larger than that of any recent Ephemerids.
1874. Farrar, Christ, 65. The ephemerid that buzzes out its little hour in the summer noon.
1879. Daily Tel., 17 Oct., 5/1. This gossamer nothing [i.e., the mosquito], this aerial ephemerid, paralyses the intellect and turns the human affections to gall.
