a. 绿灰色的, 蓝绿色的, (葡萄等)表面起白霜的

[ adj ]
having a frosted look from a powdery coating, as on plants
<adj.all>
glaucous stemsglaucous plums
glaucous grapes

Glaucous \Glau"cous\ (gl[add]"k[u^]s), a. [L. glaucus, Gr.
glayko`s.]
1. Of a sea-green color; of a dull green passing into grayish
blue. --Lindley.

2. (Bot.) Covered with a fine bloom or fine white powder
easily rubbed off, as that on a blue plum, or on a cabbage
leaf. --Gray.