A speculative branch of physics concerned with mechanical systems operating under time-reversed conditions. If you could reverse time, Newton's laws would still hold (they're time-symmetric), but every collision, every trajectory, every mechanical interaction would play out backward. Retromechanics describes this reversed world: balls un-bouncing, pendums unsweeping, planets un-orbiting. It's a useful thought experiment for understanding why the Second Law of Thermodynamics (which isn't time-symmetric) gives time its direction, even though the underlying mechanics don't care which way the clock runs.
Retromechanics (Physics) Example: "The simulation showed planets orbiting backward, demonstrating retromechanics—gravity doesn't care about time's direction, even though everything else does."
by Dumu The Void March 11, 2026
Get the Retromechanics (Physics) mug.A spanking you give to your adult offspring after you find out something atrocious they did as a child.
Bobby jr. may be 40 now but he still needs a retroactive spanking for taking his papaws truck and trading it for Pokémon cards.
by 1Bigreg64 June 3, 2025
Get the Retroactive spanking mug.Someone with a love of things (art, literature, clothes, architecture, etc) that are old-school, traditional, vintage, or simply charmingly old-fashioned.
It can include a love for any past era... be it the Tudor age, the Victorian era, or the 1980s.
A portmanteau of retro and romanticist.
It can include a love for any past era... be it the Tudor age, the Victorian era, or the 1980s.
A portmanteau of retro and romanticist.
"So are you an old fogey, conservative, reactionary, or what?"
"I'm simply a retromanticist, m'lady."
"I'm simply a retromanticist, m'lady."
by Buffo Buff January 14, 2026
Get the Retromanticist mug.