keystone

Etymology

key +‎ stone

Pronunciation

• IPA^(key): /ˈkiː.stəʊn/

Noun

keystone (plural keystones)

1. (architecture) The top stone of an arch.
2. Something on which other things depend for support.
   • 1999, Eliezer Geisler, Methodology, Theory, and Knowledge in the Managerial and Organizational ...

     Tension between empirical and theoretical knowledge is keystone to sociological and to organizational theories, as early as in Marx's and Weber's frameworks.

3. A native or resident of the American state of Pennsylvania.

Verb

keystone (third-person singular simple present keystones, present participle keystoning, simple past and past participle keystoned)

1. (transitive) To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.

Anagrams

• keynotes, keytones