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 periodicals archive ?
The immersion heaters' swan song finally came to an abrupt end when Minister of National Defence Peter MacKay announced at CFB Gagetown in May 2010 that DEW had been awarded a contract for 2,110 field space heaters and 520 immersion water heaters.
Sentencing Dews to six months' imprisonment on each charge, to run concu-rently, and suspended for two years, the Stipendiary told 'him he was a man of intelligence and education.
Most studies of dew formation ignore plant exudates, both qualitatively and quantitatively (e.
The other four people who had been with Dews have been arrested and are awaiting trial on charges of murder, he said.
Dews continued, "We were disappointed to see our retailer close, because the in-store branch had been extremely successful.
In the final, Dews found himself trailing Dyson at the 11th end by 12-5, but he then had a six break before Dyson managed another three (15-11 to Dyson).
The business was founded by Ernest Dews, the grandfather of current chairman and managing director David Hamer.
The board of directors, John Dews and their team, have done an excellent job of serving El Dorado and we are pleased that they will continue that leadership as a part of the Simmons First team.
The field included four of this season's previous winners - all handicapped minus one - but Fellows went through to beat Wayne Dews 21-16 in the final.
Nigel Dews, John Fairfax Holdings' general manager business development and online services, said the venture is a breakthrough for both Fairfax and Dow Jones.
WAYNE DEWS p roved himself king of the ice to land a place i n the G r i f f i n Champion of Champions final.