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  2. Keystone (architecture) - Wikipedia

    en.wikipedia.org/wiki/Keystone_(architecture)

    The keystone (shown in red) of an arch Dropped keystone at Colditz Castle. A keystone (or capstone) is the wedge-shaped stone at the apex of a masonry arch or typically round-shaped one at the apex of a vault. In both cases it is the final piece placed during construction and locks all the stones into position, allowing the arch or vault to ...

  3. Path of Exile - Wikipedia

    en.wikipedia.org/wiki/Path_of_Exile

    The expansion contains the Sentinel challenge league, 20 atlas keystone passives, seven uber version boss fights, new pinnacle unique items, revamped monster modifiers taken from the Archnemesis league mechanics and some Bloodlines and Nemesis mechanics which are removed as leagues from the core game, game controller support and more.

  4. Keystone species - Wikipedia

    en.wikipedia.org/wiki/Keystone_species

    Keystone mutualists are organisms that participate in mutually beneficial interaction, the loss of which would have a profound impact upon the ecosystem as a whole. For example, in the Avon Wheatbelt region of Western Australia , there is a period of each year when Banksia prionotes (acorn banksia) is the sole source of nectar for honeyeaters ...

  5. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  6. Keystone effect - Wikipedia

    en.wikipedia.org/wiki/Keystone_effect

    The keystone effect is the apparent distortion of an image caused by projecting it onto an angled surface. It is the distortion of the image dimensions, such as making a square look like a trapezoid, the shape of an architectural keystone, hence the name of the feature. In the typical case of a projector sitting on a table, and looking upwards ...

  7. Keystone Symposia - Wikipedia

    en.wikipedia.org/wiki/Keystone_Symposia

    Keystone Symposia on Molecular and Cellular Biology or Keystone Symposia is an internationally recognized [1] nonprofit organization that annually hosts 50–60 conferences and symposia covering a range of research fields in the life sciences and biomedical sciences. Most conferences are held in westward mountain venues in North America but ...

  8. Keystone module - Wikipedia

    en.wikipedia.org/wiki/Keystone_module

    A keystone module is a standardized snap-in package for mounting a variety of low-voltage electrical jacks or optical connectors into a keystone wall plate, face plate, surface-mount box, or a patch panel. Keystone modules have a rectangular face of 14.5 mm wide by 16.0 mm high and are held in place with flexible tabs.

  9. Keystone (beer brand) - Wikipedia

    en.wikipedia.org/wiki/Keystone_(beer_brand)

    Keystone beer is a product of the Molson Coors Beverage Company in Golden, Colorado. It was first introduced in Chico, California in September 1989. Keystone Ice can be found in canned, kegged , and occasionally, bottled form, with 5.9% ABV.