Dette er ikke en ordbog! - Søg efter "keystone" i Den Danske Ordbog
10. februar 2013 fra wordnet.princeton.edu
a central cohesive source of support and stability; "faith is his anchor"; "the keystone of campaign reform was the ban on soft money"; "he is the linchpin of this firm"
29. februar 2016 fra wordnet.princeton.edu
the central building block at the top of an arch or vault
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