Moisture


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Related to Moisture: Moisture Meter, Soil moisture

moisture

[′mȯis·chər]
(climatology)
The quantity of precipitation or the precipitation effectiveness.
(meteorology)
The water vapor content of the atmosphere, or the total water substance (gaseous, liquid, and solid) present in a given volume of air.
(physical chemistry)
Water that is dispersed through a gas in the form of water vapor or small droplets, dispersed through a solid, or condensed on the surface of a solid.

Moisture

 

the water content of physical bodies. Moisture depends upon the relative humidity of the surrounding environment, upon the nature of the substance, and, in solids, also upon the degree of porosity and the size of the particles—that is, the general dimensions of the interior and exterior surfaces of the objects. The concept of moisture does not include the content of crystalline water or of chemically bound, so-called constitutional, water—for example, the H2O that is produced only during chemical decomposition.

Moisture is usually characterized by the quantity of water in a substance, expressed in the percentage of the original mass of the moist substance (moisture by mass) or its volume (volume moisture). Moisture can also be characterized as the moisture content, or absolute moisture—the quantity of water relative to a unit of weight of the dry portion of the substance. It is of great significance to the national economy to establish the acceptable degree of moisture for many products and materials; such substances as grain or cement are only useful up to a certain moisture content. The vitality of animal and plant organisms is possible only within certain limits of moisture and relative humidity of the surrounding atmosphere.

References in classic literature ?
Perhaps a sudden rainstorm has splashed its fatal moisture upon an unwiped joint.
Minute diamonds of moisture from the mist hung, too, upon Tess's eyelashes, and drops upon her hair, like seed pearls.
As the lines were cast off and the steamer swung out into the current, those near him saw the moisture well up in Daylight's eyes.
Despite his chill, and despite his teeth that were already beginning to chatter while the burning sun extracted the moisture in curling mist-wreaths from the deck planking, Van Horn cuddled Jerry in his arms and called him princeling, and prince, and a king, and a son of kings.
They drew a line to mark the division, and neither, lapping up what scant moisture fell during the night-hours, ever dreamed of trespassing across the line.
The decks smelled of damp woolens, and the air was so humid that drops of moisture kept gathering upon his hair and mustache.
A few steps more, and it was within an arm's length, distinct, dark with moisture, and insignificant in size.
Matthew, with a suspicious moisture in his eyes, got up and went out-of-doors.
In the nature of the land, however, around Maldonado, no such reason is apparent; the rocky mountains afford protected situations; enjoying various kinds of soil; streamlets of water are common at the bottoms of nearly every valley; and the clayey nature of the earth seems adapted to retain moisture.
The moisture dripped from the same ledge in the wall on to the sodden leaves beneath, as it had done all through the afternoons of all those past Novembers.
Except for the slight quiver of her lips and the moisture in her eyes that made them brighter, her smile was almost calm as she said:
The fog was much heavier than it had been in the early part of the night; and the atmosphere was so damp, that, although no rain fell, Oliver's hair and eyebrows, within a few minutes after leaving the house, had become stiff with the half-frozen moisture that was floating about.