ephemeron

e·phem·er·on  (-fm-rn)

n. pl. e·phem·er·a (-r-) or e·phem·er·ons

1. A short-lived thing.

2. ephemera Printed matter of passing interest.

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[Greek ephmeron, mayfly, from neuter of ephmeros, daily, short-lived; see ephemeral.]

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ephemeron [ɪˈfɛməˌrɒn]

n pl -era [-ərə], -erons

(usually plural) something transitory or short-lived

[see ephemeral]

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ephemeron

anything shortlived, or of brief duration, especially certain types of insects such as the mayfly.

See also: Insects

Thesaurus

Noun

1.

ephemeron - anything short-lived, as an insect that lives only for a day in its winged form ephemeral insect - small air-breathing arthropod