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  2. Air (classical element) - Wikipedia

    en.wikipedia.org/wiki/Air_(classical_element)

    In ancient Greek medicine, each of the four humours became associated with an element. Blood was the humor identified with air, since both were hot and wet. Other things associated with air and blood in ancient and medieval medicine included the season of spring, since it increased the qualities of heat and moisture; the sanguine temperament (of a person dominated by the blood humour ...

  3. Anti-access/area denial - Wikipedia

    en.wikipedia.org/wiki/Anti-access/area_denial

    Anti-access/area denial (or A2/AD) is a military strategy to control access to and within an operating environment. [2] In an early definition, anti-access refers to those actions and capabilities, usually long-range, designed to prevent an opposing force from entering an operational area.

  4. Prohibited airspace - Wikipedia

    en.wikipedia.org/wiki/Prohibited_airspace

    A prohibited airspace is an area (volume) of airspace within which flight of aircraft is not allowed, usually due to security concerns. It is one of many types of special use airspace designations and is depicted on aeronautical charts with the letter "P" followed by a serial number.

  5. Aeration - Wikipedia

    en.wikipedia.org/wiki/Aeration

    Aeration (also called aerification or aeriation) is the process by which air is circulated through, mixed with or dissolved in a liquid or other substances that act as a fluid (such as soil). Aeration processes create additional surface area in the mixture, allowing greater chemical or suspension reactions.

  6. Air permeability specific surface - Wikipedia

    en.wikipedia.org/wiki/Air_permeability_specific...

    The air permeability specific surface of a powder material is a single-parameter measurement of the fineness of the powder. The specific surface is derived from the resistance to flow of air (or some other gas) through a porous bed of the powder. The SI units are m 2 ·kg −1 ("mass specific surface") or m 2 ·m −3 ("volume specific surface").

  7. Holy water - Wikipedia

    en.wikipedia.org/wiki/Holy_water

    The Apostolic Constitutions, whose texts date to c. 400 AD, attribute the precept of using holy water to the Apostle Matthew.It is plausible that the earliest Christians may have used water for expiatory and purificatory purposes in a way analogous to its employment in Jewish Law ("And he shall take holy water in an earthen vessel, and he shall cast a little earth of the pavement of the ...

  8. Bay Area Air Quality Management District - Wikipedia

    en.wikipedia.org/wiki/Bay_Area_Air_Quality...

    The Bay Area Air District (BAAD), formerly Bay Area Air Quality Management District or BAAQMD, is a public agency that regulates the stationary sources of air pollution in the nine counties of California's San Francisco Bay Area: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, southwestern Solano, and southern Sonoma ...

  9. Area C (West Bank) - Wikipedia

    en.wikipedia.org/wiki/Area_C_(West_Bank)

    This page is subject to the extended confirmed restriction related to the Arab-Israeli conflict. Area C in blue and light blue. East Jerusalem in red Area C is the fully Israeli-controlled territory in Judea and Samaria, defined as the whole area outside the Palestinian enclaves (Areas A and B). Area C constitutes about 61 percent of the West Bank territory, containing most Israeli settlements ...