Evanescent

Evanescent
adj.

Definition: 1. tending to vanish like vapor; 2. disappearing quickly and being forgotten
Synonyms: fleeting, short-lived, temporal, impermanent, transient, elusive
Antonyms: enduring, lasting, permanent

Sample Sentences:

Rainbows are a beautiful, but unfortunately evanescent, effect of rain and sunshine.

Once the evanescent mist had passed, the birds began to chirp happily.

Usage:

http://physicsworld.com/cws/article/news/2009/dec/20/evanescent-waves-bring-new-window-into-the-nanoworld

http://www.postcarbon.org/article/40397-our-evanescent-culture-and-the-awesome

Paragraph:

Evanescent can be used to describe fleeting joys or passions. In addition, it can be used as a scientific term with waves of light or other such elusive elements. In literature, said of smoke or mist, it denotes gradual fading. Evanescent is related to ephemeral, fleeting, and transitory.

Visual Representations: