A small plastic sphere floated in large numbers on top of a reservoir, pool, etc. to slow evaporation, block sunlight, or deter birds from landing.

plural of shade ball

(archaic) A tint measured from 0 to 10 on a scale for comparing different varieties of coal according to the amount of unburnt carbon in their smoke.

plural of smoke-shade

In an auction, the practice of bidding less than what one believes the goods are worth.

Synonym of aviator sunglasses

plural of wall-shade

A bracket attached to a wall, bearing a candle or lamp protected by a candle-shade.

(historical) The oldest form of candle-shade, consisting of a tall glass cylinder which stood on a table, the candlestick and candle being placed bodily within it.

plural of eye-shade