conversely

Adverb

conversely (not comparable)

1. (conjunctive, often) With a reversed relationship.
   • If two parallelograms, which have one angle of the one equal to one angle of the other, be equal to one another, the sides about the equal angles are reciprocally proportional, and conversely.1784, John West, “[Elements of Geometry.] Proposition VIII.”, in Elements of Mathematics. […], Edinburgh: Printed for William Creech; and sold in London by T[homas] Longman and T[homas] Cadell....
   • Proposition I. If four quantities are proportional, the product of the extremes is equal to the product of the means, and conversely.1860, Benjamin Greenleaf, “Section XIX. Ratios.”, in A Practical Treatise on Algebra, […], 35th improved stereotype edition, Boston, Mass.: Published by Robert S. Davis & Co.; […], →OCLC, page 207

   Synonyms:

   the other way round

2. (broadly, conjunctive) From another point of view; on the other hand.
   • At 123 yards, Royal Troon's par-3 eighth in the shortest hole in the Open Championship rota. Known as the "Postage Stamp," the eighth's distance has produced plenty of aces – most recently, Ernie Els in 2004, but Gene Sarazen's hole-in-one remains the benchmark, as the Squire accomplished said feat...2016 July 12, Joel Beall, “Watch Rory McIlroy Make a 9 at Royal Troon’s Postage Stamp”, in Golf Digest, archived from the original on 15 Nov 2016
   • So the issue of unification only comes up when the geometry can no longer be treated as a mere background, or conversely, when the classical theory is no longer accurate. But these circumstances exist (as far as we know) in only two places: the earliest moments of the Big Bang, and the immediate...2017 April 13, Viktor T. Toth, “Why Do General Relativity and Quantum Mechanics Need to be Unified?”, in Forbes, archived from the original on 06 Nov 2018

   Synonyms:

   at the same time, however, on the flip side, then again