Mist or fog.
ETYM Akin to LG., Dutch, and Dan. damp vapor, steam, fog, German dampf, Icel. dampi, Swed. damb dust, and to MNG. dimpfen to smoke, imp. dampf.
A slight wetness; SYN. dampness, moistness.
1. An atmosphere in which visibility is reduced because of a cloud of some substance; SYN. fogginess, murk, murkiness.
2. Droplets of water vapor suspended in the air near the ground.
Cloud that collects at the surface of the Earth, composed of water vapor that has condensed on particles of dust in the atmosphere. Cloud and fog are both caused by the air temperature falling below dew point. The thickness of fog depends on the number of water particles it contains. Officially, fog refers to a condition when visibility is reduced to 1 km or less, and mist or haze to that giving a visibility of 1–2 km.
There are two types of fog. An advection fog is formed by the meeting of two currents of air, one cooler than the other, or by warm air flowing over a cold surface. Sea fogs commonly occur where warm and cold currents meet and the air above them mixes. A radiation fog forms on clear, calm nights when the land surface loses heat rapidly (by radiation); the air above is cooled to below its dew point and condensation takes place. A mist is produced by condensed water particles, and a haze by smoke or dust.
In drought areas, for example, Baja California, Canary Islands, Cape Verde islands, Namib Desert, Peru, and Chile, coastal fogs enable plant and animal life to survive without rain and are a potential source of water for human use (by means of water collectors exploiting the effect of condensation).
Industrial areas uncontrolled by pollution laws have a continual haze of smoke over them, and if the temperature falls suddenly, a dense yellow smog forms. At some airports since 1975 it has been possible for certain aircraft to land and take off blind in fog, using radar navigation.
ETYM French gaze; so called because it was first introduced from Gaza, a city of Palestine.
Diaphanous woven fabric of silk, cotton, fine worsted yarn, or other fiber. Paired warp threads are twisted between each insert of weft, to achieve an open structure.
A transparent fabric with a loose open weave; SYN. netting, veiling.
ETYM Cf. Icel. höss gray; akin to AS. hasu, heasu, gray; or Armor. aézen, ézen, warm vapor, exhalation, zephyr.
Atmospheric moisture or dust or smoke that causes reduced visibility.
1. Cloudiness resulting from haze or mist; SYN. mistiness.
2. Vagueness attributable to being not clearly defined.
ETYM AS. mist.
(Homonym: missed [from to miss]).
A thin fog with condensation near the ground.
Low cloud caused by the condensation of water vapor in the lower part of the atmosphere. Mist is less thick than fog, visibility being 1–2 km.
ETYM Old Eng. vapour, Old Fren. vapour, vapor, vapeur, French vapeur, Latin vapor. Related to Vapid.
Fine separated particles floating in the air and clouding it. A substance in the gaseous state.
(Alternate spelling: vapour).
A visible suspension in the air of particles of some substance; SYN. vapour.
One of the three states of matter (see also solid and liquid). The molecules in a vapor move randomly and are far apart, the distance between them, and therefore the volume of the vapor, being limited only by the walls of any vessel in which they might be contained. A vapor differs from a gas only in that a vapor can be liquefied by increased pressure, whereas a gas cannot unless its temperature is lowered below its critical temperature; it then becomes a vapor and may be liquefied.
ETYM Old Eng. wrak wreck. Related to Wreck.
1. Dried seaweed esp. that cast ashore.
2. The destruction or collapse of something; SYN. rack.
Seaweed or wreckage cast up on shore.
Sea-weed cast up on shore; wreckage; vestige.
Any of the large brown seaweeds characteristic of rocky shores. The bladder wrack Fucus vesiculosus has narrow, branched fronds up to 1 m/3.3 ft long, with oval air bladders, usually in pairs on either side of the midrib or central vein.