Word of the Day

December

From the Latin word decem, "ten," because this had been the tenth month of the early Roman calendar.

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Staunch

Strong and tight; sound; firm; as, a stanch ship.

Pyrheliometer

An instrument that measures direct solar radiation.

Altostratus cloud

Grayish or bluish layer of clouds that can obscure the Sun.

Phenology

The study of natural periodic events in the life-cycle of plants (and animals).

Wallop

A quick, rolling movement; a gallop. To boil with a continued bubbling or heaving and rolling, with noise.

Arachnophobia

Fear of spiders

Nimbostratus cloud

Dark, shapeless cloud layer containing rain, snow, and ice pellets.