evanescent🔊

Disappearing, vanishing.

(electromagnetism) Of an oscillating electric or magnetic field: not propagating as an electromagnetic wave but having its energy spatially concentrated in the vicinity of its source.

(mathematics) Of a number or value: diminishing to the point of reaching zero as a limit; infinitesimal.

Barely there; almost imperceptible.

Ephemeral, fleeting, momentary.

(botany) Of plant parts: shed after a period.