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  2. Glossary of climbing terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_climbing_terms

    A A-grade Also aid climbing grade. The technical difficulty grading system for aid climbing (both for "original" and an adapted version for "new wave"), which goes: A0, A1, A2, A3, A4, A5 and up to A6 (for "new wave"). See C-grade. Abalakov thread Abalakov thread Also V-thread. A type of anchor used in abseiling especially in winter and in ice climbing. ABD Also assisted braking device. A term ...

  3. Wikipedia:Reference desk/Archives/Language/2006 December 30

    en.wikipedia.org/wiki/Wikipedia:Reference_desk/...

    Note, however, that "unreached" and "unreachable" are formed from "reached" and "reachable" respectively (adjectives). There is no word "unreach", but this is not because of what dictionaries say, but because 'reaching' is not among the kind of concepts to which the meaning of 'un-' attaches. --ColinFine 18:13, 1 January 2006 (UTC)

  4. Point of sail - Wikipedia

    en.wikipedia.org/wiki/Point_of_sail

    A given point of sail (beating, close reach, beam reach, broad reach, and running downwind) is defined in reference to the true wind—the wind felt by a stationary observer. The motive power , and thus appropriate position of the sails, is determined by the apparent wind : the wind relative to an observer on the sailing craft.

  5. David B. Barkley - Wikipedia

    en.wikipedia.org/wiki/David_B._Barkley

    When information was desired as to the enemy's position on the opposite side of the Meuse River, Pvt. Barkeley, with another soldier, volunteered without hesitation and swam the river to reconnoiter the exact location. He succeeded in reaching the opposite bank, despite the evident determination of the enemy to prevent a crossing.

  6. Nadir - Wikipedia

    en.wikipedia.org/wiki/Nadir

    Diagram showing the relationship between the zenith, the nadir, and different types of horizon.Note that the zenith is opposite the nadir. The nadir [a] [b] is the direction pointing directly below a particular location; that is, it is one of two vertical directions at a specified location, orthogonal to a horizontal flat surface.

  7. Mass marketing - Wikipedia

    en.wikipedia.org/wiki/Mass_marketing

    Mass marketing is the opposite of niche marketing, as it focuses on high sales and low prices and aims to provide products and services that will appeal to the whole market. Niche marketing targets a very specific segment of market ; for example, specialized services or goods with few or no competitors .

  8. Anti-greenhouse effect - Wikipedia

    en.wikipedia.org/wiki/Anti-greenhouse_effect

    This acts to reduce solar energy reaching the surface and lets infrared energy escape, cooling Titan's surface. Titan has both a greenhouse and an anti-greenhouse effect which compete with one another. The greenhouse effect warms Titan by 21 K while the anti-greenhouse effect cools Titan by 9 K, so the net warming is 12 K (= 21 K - 9 K). [3] [4]

  9. Antiphrasis - Wikipedia

    en.wikipedia.org/wiki/Antiphrasis

    Antiphrasis is the rhetorical device of saying the opposite of what is actually meant in such a way that it is obvious what the true intention is. [1] Some authors treat and use antiphrasis just as irony, euphemism or litotes. [2] When the antiphrasal use is very common, the word can become an auto-antonym, [3] having opposite meanings ...