Originally Posted by
2frmMI
By the way, what is the singular form - ephemerum?
Good question!
The singular is
ephemeron.
Originally Posted by Dictionary.com
e·phem·er·on
[ih-fem-uh-ron, -er-uhn]
–noun, plural -er·a
[-er-uh]
, -er·ons.
1. anything short-lived or ephemeral.
2. ephemera, items designed to be useful or important for only a short time, especially pamphlets, notices, tickets, etc.
The origin is from short-lived insects, such as the Mayfly, or Western Tiger Swallowtail Butterflies in the path of Zonatandem.
Origin:
1570–80; < Greek ephḗmeron short-lived insect, noun use of neuter of ephḗmeros; see ephemeral