EPR

EPR (countable and uncountable, plural EPRs)

1. (aviation) Initialism of engine pressure ratio (the ratio of pressure between exhaust and inlet of a jet engine).
2. (finance) Initialism of expected profit rate.
3. (nuclear energy) Initialism of European Pressurised Reactor, a type of nuclear reactor, later also an initialism of Evolutionary Power Reactor.
4. (medicine) Initialism of electronic patient record.
5. (environment, law) Initialism of extended producer responsibility.
   • 2025 May 31, Rachel Cernansky, “Solving fashion's waste problem”, in FT Weekend, Life & Arts, page 4:

     From California to the EU, legislators are moving ahead with a concept known as extended producer responsibility (EPR), which aims to hold brands accountable for what happens to the products they put out into the world.

From the initials of the three theoreticians to conceived of the paradox, Einstein (Albert Einstein), Podolsky (Boris Podolsky), Rosen (Nathan Rosen).

EPR

1. (uncountable, physics) Short for Einstein–Podolsky–Rosen paradox

(Einstein Podolsky Rosen):

• ER=EPR / EPR=ER (a conjecture about the nature of the universe that connects quantum physics to spacetime physics)
• EPR telephone (a conjecture to communicate non-locally, faster than light, back in time)

• ER (Einstein-Rosen)

• ERP, PER, Per., RPE, Rep, Rep., per, per-, per., pre, pre-, rep