1. covered with a whitish or grayish bloom or powder; having a pale grayish-blue or grayish-green color
Usage: commonly used in botany and biology to describe plant surfaces

Examples

• The glaucous coating on the plum gives it a dull, frosted appearance.
• Glaucous leaves often have a waxy layer that helps the plant retain water.
• The glaucous bloom on the grape protects it from sun damage.
• Botanists identified the species by its glaucous stem and pale foliage.
• The glaucous surface of the cactus reflects light and reduces water loss.