- ephemeris second,
- ephemeris time,
Origin of ephemerid
Examples from the Web for ephemerid
In the Ephemerid they lie in planes approaching the vertical, slightly diverging from each other towards their extremities.
Those examples are provided by Rotifera (inferior worms) and by Ephemerid.Life of Elie Metchnikoff, 1845-1916|Olga Metchnikoff
The name of the family to which they belong, Ephemerid, suggests their ephemeral existence.Cornell Nature-Study Leaflets|Various
They are like the Ephemerid insects which live for a summer day only.The Romance of Plant Life|G. F. Scott Elliot
I do not propose in this work to deal with Ephemerid, as the wings in the imitations now sold are in the natural position.