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[ih-fem-er-uh] /ɪˈfɛm ər ə/

noun, plural ephemeras, ephemerae
[ih-fem-uh-ree] /ɪˈfɛm əˌri/ (Show IPA), for 2.
a plural of .
an ephemerid.
noun (pl) -eras, -erae (-əˌriː)
a mayfly, esp one of the genus Ephemera
something transitory or short-lived
(functioning as pl) a class of collectable items not originally intended to last for more than a short time, such as tickets, posters, postcards, or labels
a plural of ephemeron

late 14c., originally a medical term, from Medieval Latin ephemera (febris) “(fever) lasting a day,” from fem. of ephemerus, from Greek ephemeros “lasting only one day, short-lived,” from epi “on” (see epi-) + hemerai, dative of hemera “day,” from PIE *amer- “day.”

Sense extended 17c. to short-lived insects and flowers; general sense of “thing of transitory existence” is first attested 1751. Cf. Greek ephemeroi “men,” literally “creatures of a day.”


Read Also:

  • Ephemeral

    [ih-fem-er-uh l] /ɪˈfɛm ər əl/ adjective 1. lasting a very short time; short-lived; transitory: the ephemeral joys of childhood. 2. lasting but one day: an ephemeral flower. noun 3. anything short-lived, as certain insects. /ɪˈfɛmərəl/ adjective 1. lasting for only a short time; transitory; short-lived: ephemeral pleasure noun 2. a short-lived organism, such as the […]

  • Ephemerality

    [ih-fem-uh-ral-i-tee] /ɪˌfɛm əˈræl ɪ ti/ noun, plural ephemeralities for 2. 1. the quality or condition of being . 2. something transitory.

  • Ephemeral port

    networking A TCP or UDP port number that is automatically allocated from a predefined range by the TCP/IP stack software, typically to provide the port for the client end of a client-server communication. BSD used ports 1024 through 4999 as ephemeral ports, though it is often desirable to increase this allocation. (http://ncftpd.com/ncftpd/doc/misc/ephemeral_ports.html). (2002-10-06)

  • Ephemerid

    [ih-fem-er-id] /ɪˈfɛm ər ɪd/ noun 1. an insect of the order Ephemeroptera, comprising the mayflies. /ɪˈfɛmərɪd/ noun 1. any insect of the order Ephemeroptera (or Ephemerida), which comprises the mayflies Also called ephemeropteran

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