Keystone

Noun

 * 1)  The top stone of an arch.
 * 2) A native or resident of the American state of Pennsylvania.

Architecture

1. The highest member of an arch binding all the units together

Adjectives for Keystone
indispensable; all-supporting.

Thesaurus
apse, arcade, arcature, arch, arched roof, archway, basis, bench mark, camber, cardinal point, ceilinged roof, chief thing, climax, concameration, concha, core, cornerstone, cove, crisis, critical point, crux, cupola, dome, essence, essential, essential matter, first stone, footstone, foundation, foundation stone, fundamental, geodesic dome, gist, gravamen, great point, headstone, heart, high point, igloo, important thing, issue, kernel, landmark, main point, main thing, material point, meat, milestone, necessity, nub, ogive, pith, pivot, principle, quoin, real issue, salient point, sine qua non, skewback, span, substance, substantive point, the bottom line, the point, turning point, vault, vaulting, voussoir

Translations

 * Bulgarian: ключ
 * Catalan: clau de volta
 * Dutch: sluitstuk
 * French: clef de voûte, clé de voute, clef d'arc, clé d'arc
 * German:, Scheitelstein


 * Hebrew:
 * Italian:
 * Manx: ard-chlagh, ogher
 * Polish: zwornik, klucz , filar , podstawa

Derived terms

 * keystone pricing

Anagrams

 * keynotes