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  2. Glossary of nautical terms (M–Z) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms...

    3. Of or pertaining to the sea (e.g. marine biology, marine insurance, marine salvage). 4. A painting representing a subject related to the sea. marine sandglass (or glass) An hourglass-like timekeeping instrument used aboard ships from at least the 14th century until reliable mechanical timepieces replaced it in the early 19th century. Marine ...

  3. Crossword abbreviations - Wikipedia

    en.wikipedia.org/wiki/Crossword_abbreviations

    Roman numerals: for example the word "six" in the clue might be used to indicate the letters VI; The name of a chemical element may be used to signify its symbol; e.g., W for tungsten; The days of the week; e.g., TH for Thursday; Country codes; e.g., "Switzerland" can indicate the letters CH; ICAO spelling alphabet: where Mike signifies M and ...

  4. Ship prefix - Wikipedia

    en.wikipedia.org/wiki/Ship_prefix

    A ship prefix is a combination of letters, usually abbreviations, used in front of the name of a civilian or naval ship that has historically served numerous purposes, such as identifying the vessel's mode of propulsion, purpose, or ownership/nationality. In the modern environment, prefixes are cited inconsistently in civilian service, whereas ...

  5. List of cloud types - Wikipedia

    en.wikipedia.org/wiki/List_of_cloud_types

    In sections three to five, terrestrial clouds are listed in descending order of the altitude range of each atmospheric layer in which clouds can form: mesospheric layer; stratospheric layer; tropospheric layer. Within the troposphere, the cloud levels are listed in descending order of altitude range.

  6. Glossary of meteorology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_meteorology

    The Earth's atmosphere is the origin of the weather phenomena studied in meteorology. Atmospheric composition, temperature, and pressure vary across a series of distinct sublayers including the troposphere and stratosphere. The properties of Earth's atmosphere vary by altitude across a series of distinct layers. atmospheric boundary layer (ABL)

  7. Air mass - Wikipedia

    en.wikipedia.org/wiki/Air_mass

    [3] The stability of an air mass may be shown using a third letter, either "k" (air mass colder than the surface below it) or "w" (air mass warmer than the surface below it). [3] An example of this might be a polar air mass blowing over the Gulf Stream, denoted as "cPk". Occasionally, one may also encounter the use of an apostrophe or "degree ...

  8. Weather front - Wikipedia

    en.wikipedia.org/wiki/Weather_front

    The second letter describes the thermal characteristic of its source region: T for t ropical, P for p olar, A for A rctic or A ntarctic, M for m onsoon, E for e quatorial, and; S for s uperior air (dry air formed by significant upward lift in the atmosphere). The third letter designates the stability of the atmosphere; it is labeled:

  9. Cloud - Wikipedia

    en.wikipedia.org/wiki/Cloud

    This is an accepted version of this page This is the latest accepted revision, reviewed on 30 January 2025. Visible mass of liquid droplets or frozen crystals suspended in the atmosphere "Nephology" redirects here. Not to be confused with Nephrology. For other uses, see Cloud (disambiguation). Cloudscape over Borneo, taken by the International Space Station Part of a series on Weather ...