ppl. a. [f. EVANESCE + -ING2.] That passes quickly away.
1805. Med. Jrnl., XIV. 537. Symptomatic fever of a mild nature took place about the 9th day, and the usual evanescing course followed.
1847. Emerson, Repr. Men, Swedenborg, Wks. (Bohn), I. 328. It is dangerous to sculpture these evanescing images of thought.