This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Vanishing or likely to vanish like vapor.

adj. Vanishing, disappearing.

adj. Ephemeral, momentary, fleeting.

adj. Barely there; almost imperceptible.

adj. Liable to vanish or pass away like vapor; vanishing; fleeting.

adj. Vanishing from notice; imperceptible.

Vanishing, or apt to vanish or be dissipated, like vapor; passing away; fleeting: as, the pleasures and joys of life are evanescent.

Lessening or lessened beyond the reach of perception; impalpable; imperceptible.

In natural history, unstable; unfixed; hence, uncertain; unreliable: applied to characters which are not fixed or uniformly present, and therefore are valueless for scientific classification.

In entomology, tending to become obsolete in one part; fading out: as, antennal scrobes evanescent posteriorly.

In mathematics, infinitesimal.

adj. tending to vanish like vapor

"In part, it arises because an exotic form of light wave generated at the interface, called an "evanescent" wave, is lost in passing through the glass of a lens, with a consequent loss of information and a slight spoiling of image sharpness."

impermanent    temporary   

evanescence   

vanishing    fleeting    imperceptible    transient    ephemeral   

Crescent    adolescent    antidepressant    convalescent    crescent    depressant    effervescent    fluorescent    incandescent    incessant   

fleeting    ephemeral    impermanent    ethereal    unsubstantial    elusive    imperishable    ineffable    intoxicating    indefinable