dew

(redirected from dews)
Also found in: Dictionary, Thesaurus, Acronyms, Idioms.
Related to dews: news

dew,

thin film of water that has condensed on the surface of objects near the ground. Dew forms when radiational cooling of these objects during the nighttime hours also cools the shallow layer of overlying air in contact with them, causing the condensationcondensation,
in physics, change of a substance from the gaseous (vapor) to the liquid state (see states of matter). Condensation is the reverse of vaporization, or change from liquid to gas.
..... Click the link for more information.
 of some water vapor. This condensation occurs because the capacity of air to hold water vapor decreases as the air is cooled. The temperature at which condensation begins, for a sample of air with a given water vapor content, is termed the dew point. If a dew point temperature below 32°F; (0°C;) is reached, sublimation occurs, i.e., the water vapor converts directly to frostfrost
or hoarfrost,
ice formed by the condensation of atmospheric water vapor on a surface when the temperature of the surface is below 32°F; (0°C;). In the formation of frost, a gas (water vapor) is changed directly to a solid (see dew).
..... Click the link for more information.
. Should the surface temperature drop below 32°F; after the dew has already collected, the dew may freeze into so-called white dew. Most authorities account for the supply of water vapor as coming from the atmosphere, though some research suggests that it also diffuses up through the soil and then condenses on the ground surface if conditions are favorable. Dew forms most readily on those surfaces that lose heat through radiation most efficiently but are nevertheless insulated from external heat sources. Dew formation is favored by high humidity in the lowest layers of air, which either supplies the moisture or at least inhibits the evaporation of the dew already deposited. Strong winds inhibit dew formation because they mix a larger layer of air, creating a more homogeneous distribution of heat and water vapor; under such circumstances it is unlikely that a sufficiently cool and damp layer of air can form near the ground.

Dew

 

tiny droplets of atmospheric precipitation that form in the evening, at night, and in the early morning at temperatures above freezing on the surfaces of the ground, various objects, and plants. Dew is formed as a result of the cooling of the air and the condensation of water vapor on a given surface; the temperature of the surface falls below the dew point as a result of the heat lost by radiation in the evening and night hours. Heavy dew forms when there is clear weather and a weak wind. The amount of precipitation collected from dew is small—on the average approximately 0.1–0.3 mm nightly.

dew

[]
(hydrology)
Water condensed onto grass and other objects near the ground, the temperatures of which have fallen below the dew point of the surface air because of radiational cooling during the night but are still above freezing.

dew

drops of water condensed on a cool surface, esp at night, from vapour in the air
References in classic literature ?
Thus they dwelt in deepest sorrow, till one day there came to them an unknown messenger, wrapped in a dark mantle, who looked with wondering eyes on the bright palace, and flower-crowned elves, who kindly welcomed him, and brought fresh dew and rosy fruit to refresh the weary stranger.
Before yet any woodchuck or squirrel had run across the road, or the sun had got above the shrub oaks, while all the dew was on, though the farmers warned me against it -- I would advise you to do all your work if possible while the dew is on -- I began to level the ranks of haughty weeds in my bean-field and throw dust upon their heads.
Their words rejoiced Ferko's heart, and he waited impatiently till evening should come and he could rub the precious dew on his sightless eyes.
At last it began to grow dusk, and the sun sank behind the mountains; gradually it became cooler on the hill, and the grass grew wet with dew.
But on this night, waiting for the dew, a little of it, to become more, on the surfaces that were mine, I heard the noises of a dew-lapper moving aft along the port- gunwale--which was my property aft of the stroke-thwart clear to the stern.
It chanced I was holding a boat-stretcher in my hand--to catch what little dew might fall upon it.
Her plates are scarred by the sun, dear lass, And her ropes are taut with the dew, For we're booming down on the old trail, our own trail, the out trail,
What have we in common with the rose-bud, which trembleth because a drop of dew hath formed upon it?
The dew, not visible till the sun was up, wetted Levin's legs and his blouse above his belt in the high growing, fragrant hemp patch, from which the pollen had already fallen out.
The sedge, silvery with dew before, now shone like gold.
There was some exceptional bowling throughout and Dews probably played the tricky conditions as well as anyone.
Place Dews, had had a number of nervous breakdowns and over a number of years he never settled down.