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WordReference Random House Unabridged Dictionary of American English © 2024e•phem•er•a (i fem′ər ə),USA pronunciation n., pl. -er•as, -er•ae (-ə rē′)USA pronunciation for 2.- a pl. of ephemeron.
- Insectsan ephemerid.
- Greek ephé̄mera, neuter plural of ephé̄meros, taken as singular; see ephemeral
- 1670–80
Collins Concise English Dictionary © HarperCollins Publishers:: ephemera /ɪˈfɛmərə/ n ( pl -eras, -erae / -əˌriː/)- a mayfly, esp one of the genus Ephemera
- something transitory or short-lived
- (functioning as plural) 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
Etymology: 16th Century; see ephemeral e•phem•er•on (i fem′ə ron′, -ər ən),USA pronunciation n., pl. -er•a (-ər ə),USA pronunciation -er•ons. - anything short-lived or ephemeral.
- ephemera, items designed to be useful or important for only a short time, esp. pamphlets, notices, tickets, etc.
- Greek ephé̄meron short-lived insect, noun, nominal use of neuter of ephé̄meros; see ephemeral
- 1570–80
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