GLAUCOUS
glaucous
(adjective) having a frosted look from a powdery coating, as on plants; “glaucous stems”; “glaucous plums”; “glaucous grapes”
Source: WordNet® 3.1
Etymology
Adjective
glaucous (comparative more glaucous, superlative most glaucous)
(color) Of a pale grey or bluish-green, especially when covered with a powdery residue.
(botany) Covered with a bloom or a pale powdery covering, regardless of colour.
Source: Wiktionary
Glau"cous, a. Etym: [L. glaucus, Gr.
1. Of a sea-green color; of a dull green passing into grayish blue.
Lindley.
2. (Bot.)
Definition: Covered with a fine bloom or fine white powder easily rubbed
off, as that on a blue plum, or on a cabbage leaf. Gray.
Source: Webster’s Unabridged Dictionary 1913 Edition