different between ephemeral vs ahemeral

English

Etymology

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”).

Pronunciation

• IPA^(key): /??f?.m?.??l/, /??f?.m?.??l/
• Rhymes: -???l

Noun

ephemeral (plural ephemerals)

1. Something which lasts for a short period of time.

   Synonym: ephemeron

Derived terms

• spring ephemeral

Adjective

ephemeral (comparative more ephemeral, superlative most ephemeral)

1. Lasting for a short period of time.

   Synonyms: temporary, transitory, fleeting, evanescent, momentary, short-lived, short, volatile; see also Thesaurus:ephemeral

   Antonyms: permanent, eternal, everlasting, timeless

   • 1821-1822, Vicesimus Knox, Remarks on the tendency of certain Clauses in a Bill now pending in Parliament to degrade Grammar Schools

     Esteem, lasting esteem, the esteem of good men, like himself, will be his reward, when the gale of ephemeral popularity shall have gradually subsided.

   • 1853, James Stephen, Lecture on the right use of Books

     sentences not of ephemeral, but of eternal, efficacy
2. (biology) Existing for only one day, as with some flowers, insects, and diseases.
3. (geology, of a body of water) Usually dry, but filling with water for brief periods during and after precipitation.
   • 1986, W.H. Raymond, "Clinoptilolite Deposit in the Pine Ridge Indian Reservation, South Dakota, U.S.A.", in Y?ichi Murakami et al. (editors), New Developments in Zeolite Science and Technology (conference proceedings), Elsevier, ?ISBN, page 80:

     The graben constitutes a depositional basin and a topographic low, underlain by Cretaceous shales, in which volcanic debris accumulated in ephemeral lakes and streams in Oligocene and early Miocene time.

Derived terms

• ephemerally

Related terms

• ephemera
• ephemeron
• ephemerality
• hemeral

Translations

Further reading

• ephemeral in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• ephemeral in The Century Dictionary, New York, N.Y.: The Century Co., 1911.
• ephemeral on Wikipedia.Wikipedia

English

Etymology

a- +? hemeral

Adjective

ahemeral (comparative more ahemeral, superlative most ahemeral)

1. (biology) Cyclical, with a period not equal to 24 hours
   • 2003, Robinson, Frank Edwin; Fasenko, Gaylene Marie; Robert Allen Renema New Developments in Reproduction and Incubation of Broiler Chickens, page 116

     Photostimulation at 22 weeks of age was done with either a normal, hemeral day (14 hours of light; 10 hours of darkness) or a long ahemeral day (14 hours of light; 14 hours of darkness).

Related terms

• ephemeral