hoar

adj.

灰白的；霜；

1. The old man has hoar hair.
   那位老人头发花白。
2. I thought hoar frost had fallen from the night.
   我以为夜里下白霜了。

Vapor transport, grain growth and depth-hoar development in the subarctic snow
Environmental Physiology of Animals. by William S. Hoar
Pattern and variety in development. In. Hoar WS and Randall DJ (Eds.)
Influence of the Depth Hoar Layer of the Seasonal Snow Cover on the Ground Thermal Regime
Retinoic acid embryopathy.
Ecological impacts of wind energy development on bats: questions, research needs, and hypotheses
The 1990–1995 El Niño-Southern Oscillation Event: Longest on Record
Case-Control Study of Diet and Mesothelioma in Louisiana
Identification and distinct regulation of yeast TATA box-containing genes.
El Niño and climate change