Pronunciation: \i-ˈfe-mər-ə, -ˈfem-rə\
Inflected Form(s): plural ephemera also ephem·er·ae \-mər-ē, -rē\ or ephemeras
Etymology: New Latin, from Greek ephēmera, neuter plural of ephēmeros
1: something of no lasting significance —usually used in plural
2ephemera plural : paper items (as posters, broadsides, and tickets) that were originally meant to be discarded after use but have since become collectibles.
from Merriam Webster Dictionary
from Amazon.com,a list of reference books