different between ephemerid vs ephemeride

English

Etymology

From translingual Ephemeridae, from New Latin ephemerus, from Ancient Greek ???????? (eph?meros), the more common form of ????????? (eph?mérios, “of, for, or during the day, living or lasting but for a day, short-lived, temporary”), from ??? (epí, “on”) + ????? (h?méra, “day”).

Noun

ephemerid (plural ephemerids)

1. Any mayfly in the family Ephemeridae.
   • 1975, Saul Bellow, Humboldt's Gift [Avon ed., 1976, p. 51]:

     I had flown in a helicopter with Javits and Bobby Kennedy. I was skirring around New York like an ephemerid, my jacket lined with jolly psychedelic green.

Related terms

• ephemeris

English

Etymology

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Pronunciation

• IPA^(key): /??f?m??a?d/

Adjective

ephemeride

1. Of, pertaining to, or used in an ephemeris.
   • 1991, Konrad Rudnicki, The Cosmologist's Second

     Intervals of ephemeride time can be measured by means of observations of any celestial bodies whose orbital movements can be assumed to be governed by gravitational forces […]

Latin

Noun

eph?meride

1. ablative singular of eph?meris