keystone

Etymology
Definition 4 (retail) possibly originated in the jewelry industry in the magazine called "Jewelers' Circular-Keystone".

Noun

 * 1)  The top stone of an arch.
 * 2) Something on which other things depend for support.
 * 3) A native or resident of the American state of Pennsylvania.
 * 4)  A retail price that is double the cost price; a markup of 100%.
 * 5)  The combination of the shortstop and second baseman.
 * 1)  A retail price that is double the cost price; a markup of 100%.
 * 2)  The combination of the shortstop and second baseman.

Translations

 * Arabic: حجر العقد
 * Armenian:
 * Old Armenian: պորտ
 * Azerbaijani: açardaşı
 * Basque: giltzarri
 * Bulgarian:
 * Catalan:
 * Czech: svorník
 * Danish: slutsten, kilesten
 * Dutch:
 * Esperanto: ĉefŝtono, ŝlosoŝtono
 * Estonian: päiskivi
 * Finnish: lakikivi
 * French:, , , ,
 * Galician:
 * Georgian: ქვაკუთხედი
 * German:, Scheitelstein
 * Greek:
 * Ancient: ὀμφαλός
 * Hebrew:
 * Hungarian:
 * Icelandic: höfuðsteinn, lokasteinn
 * Ido:
 * Italian: chiave di volta
 * Japanese: キーストーン
 * Kannada:
 * Korean: 쐐기돌
 * Macedonian: клучен камен
 * Maltese: ċavi
 * Manx: ard-chlagh, ogher
 * Norwegian: kronestein
 * Occitan: clau de vòlta
 * Persian: سنگ تاج
 * Plautdietsch: Akjsteen
 * Polish:, , ,
 * Portuguese: pedra angular
 * Romanian:
 * Russian: ,
 * Slovak: svorník
 * Spanish:
 * Swedish: slutsten, nyckelstenen
 * Tamil: கீஸ்டோன்
 * Ukrainian: замковий камінь, замок,


 * Bulgarian:
 * Danish: grundprincip, kardinalpunkt, hovedpunkt
 * French:
 * Occitan: clau de vòlta
 * Russian:
 * Vietnamese:

Verb

 * 1)  To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.
 * 2)  To double the cost price in order to determine the retail price; to apply a markup of 100%.