different between keystone vs mainspring

English

Etymology

key +? stone

Definition 4 (retail) perhaps originated in the jewelry industry in the magazine called "Jewelers' Circular-Keystone"Source: https://english.stackexchange.com/questions/341864/what-is-the-source-of-the-word-keystone-in-reference-to-pricing-a-product

Pronunciation

• IPA^(key): /?ki?.st??n/

Noun

keystone (plural keystones)

1. (architecture) 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. (retail) A retail price that is double the cost price; a markup of 100%.
5. (baseball) The combination of the shortstop and second baseman.

Derived terms

Translations

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.
2. (transitive, retail) To double the cost price in order to determine the retail price; to apply a markup of 100%.

Anagrams

• keynotes, keytones

English

Etymology

From main +? spring.

Noun

mainspring (plural mainsprings)

1. The principal spring of a clockwork mechanism, which drives it by uncoiling.
   • 1922, Margery Williams, The Velveteen Rabbit

     He was wise, for he had seen a long succession of mechanical toys arrive to boast and swagger, and by-and-by break their mainsprings and pass away.

2. (figuratively) The most important reason for something (Cf. spring "origin of something" (literary) (often in the plural) the springs of her ambition).

   My daughter is the mainspring of my life.

Translations