dew-bow
(ˈdjuːbəʊ)
[f. dew n., after rain-bow.]
An arch resembling a rainbow, occurring on a dew-covered surface.
| 1873 R. Johnson in Tristram Moab 387 A lunar rainbow on the ground, or to speak more correctly a lunar dew-bow. 1920 Conquest May 346/1 That curious phenomenon known as the dew bow. Ibid. 346/2 The..author may have seen a dew bow effect at his feet. 1960 New Scientist 31 Mar. 792/3 Dewbows..are rainbow effects of moonlight shining on dew-pearled grass. |